a student records the repair cost for 1717 randomly selected tvs. a sample mean of $73.10$73.10 and standard deviation of $16.01$16.01 are subsequently computed. determine the 90�% confidence interval for the mean repair cost for the tvs. assume the population is approximately normal.
Answers
Therefore, the 90% confidence interval for the mean repair cost for the VCRs is ($82.40,$90.12).
What do you mean by the term Repair cost?Subject to the exclusions outlined in this clause, the repair cost is defined as the cost of the parts and labor required to fix or replace any covered component as a result of a covered mechanical breakdown. We reserve the right to substitute components of comparable sort and quality, whether they are new, OEM, swapped, rebuilt, remanufactured, or used. The suggested retail price of a part of a like type and quality, or the manufacturer's indicated retail price for Your Vehicle, whichever is higher, may not be exceeded when pricing out parts. A current, widely used flat-rate labor guide will be used to calculate labor costs. According to state-specific rules, the Repair Cost includes the necessary taxes related to the covered Mechanical Breakdown.
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Related Questions
select the correct statement. a.) the critical z-score for a right-tailed test at a 9% significance level is 1.34. b.) the critical z-score for a two-sided test at a 4% significance level is 1.75. c.) the critical z-score for a two-sided test at a 20% significance level is 0.85. d.) the critical z-score for a left-tailed test at a 12% significance level is -0.45.
Answers
d.) the critical z-score for a left-tailed test at a 12% significance level is -0.45.
The critical z-score is the value on the standard normal distribution that separates the rejection region from the non-rejection region for a given level of significance (alpha). The critical z-score depends on the level of significance and the type of hypothesis test (one-tailed or two-tailed).
For a left-tailed test at a 12% significance level, the critical z-score can be found by looking up the z-score that corresponds to a cumulative probability of 0.12 in the standard normal distribution table. The closest value to 0.12 is 0.1190, which corresponds to a z-score of -1.18. Since this is a left-tailed test, we take the negative of the z-score to get the critical z-score, which is approximately -0.45. Therefore, option d is the correct statement.
Sabrina is x years old.
Meghan is twice as old as Sabrina.
Michael is three years younger than Meghan.
The product of Sabrina's and Michael's age is 35.
How old is Meghan?
Answers
Answer:
10
Step-by-step explanation:
If Sabrina is 5 & Michael is 7. (5×7=35)
Michael is 7, & he is 3 yrs younger than Meghan, who is 10. And Meghan is twice as old as Sabrina, when Sabrina is 5 (5×2=10).
Answer:
Meghan is 10 years old
Step-by-step explanation:
We can write out the information with equations and then combine the information. Then, we can solve for x and hence solve for Meghan's age.
We write our first variable, x. Meghan (m) is twice as old as Sabrina (x). So we write:
m = 2x
Michael (M) is 3 years younger than Meghan. So we write:
M = m - 3
The product (multiplication) of Sabrina's and Michael's age is 35. So we write:
Mx = 35
To solve for x, we can substitute Meghan's age (2x) into the equation for Michael.
M = 2x - 3
Then, we can substitute this for M in the final equation to solve for x. This will be a quadratic so we factorise to solve it:
x(2x - 3) = 35
2x² - 3x = 35
2x² - 3x -35 = 0
(2x - 7)(x - 5) = 0
x = ⁷⁄₂ or 5
we know it is 5 since ⁷⁄₂ does not work and it is not a whole number. Hence:
m = 2(5)
m = 10
Evaluate the following expression. (10+2) 6+5³
Answers
Answer:23 to the power of 3
Step-by-step explana
Answer: 197
Step-by-step explanation:
12 x 6+125
72+125
197
hope this helps!!
a debt that the company or entity enters into with the investors that pays the investors interest on that debt is refer as
Answers
Answer:
dividend,
Step-by-step explanation:
The population is (select all that apply) :
a. Larger than the sample
b. The entire group of cases we want information on
c. Impractical or too expensive to collect information from.
Answers
we must rely on estimates instead
The population is larger than the sample, and the entire group of cases we want information on.
In statistics, a population refers to the whole set of people, items, or events under consideration.
The sample is a smaller subset of the population that is taken into account.
The sample should be an accurate representation of the population from which it was chosen in order for it to be useful in making predictions or generalizations about the population. Let's look at the options and select the correct ones.
(a) Larger than the sample:
The population is the entire collection of individuals, items, or events that a researcher is interested in studying, and it is always larger than the sample. It is vital to select a sample that represents the population well to make inferences about it.
(b) The entire group of cases we want information on:
The population is the entire collection of people, items, or events that a researcher is interested in studying. It is the group of individuals from which a sample is taken. A sample is a representative of the population.
(c) Impractical or too expensive to collect information from:
When the population size is too big, it is impractical or too expensive to collect information from it.
In such cases, we have to select a representative sample.
For example, it would be impossible to count all the people who have ever lived on the planet, so we must rely on estimates instead.
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In AVWX, m/V = (4x+3)°, m/W = (x+7)°, and m/X = (5x+0)º.
What is the value of z?
1
O
0
Answers
The value of x is given as follows:
x = 17.
How to obtain the value of x?We obtain the value of x for this problem considering that the sum of the measures of the internal angles of a triangle is of 180º.
The internal angles of the triangle is given as follows:
4x + 3.x + 7.5x.The sum of the measures of the angles is of 180º, hence the value of x is given as follows:
4x + 3 + x + 7 + 5x = 180
10x + 10 = 180
10x = 170
x = 17.
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You are playing Super Mario Bros together with 2 of your friends. You got to level 4, where you encounter your nemesis Bowser. Bowser is very strong, and he is defeated only 41% of the times. Each of you will
play level 4 one time." (a) Let X be the total number of times that Bowser is defeated. What is the distribution of
X?
(b) What is the probability that only 1 of you defeats Bowser?
Answers
The distribution of X, the total number of times Bowser is defeated, follows a binomial distribution.
(a) In this scenario, each player has a 41% chance of defeating Bowser and a 59% chance of failing to defeat him. Since there are three players in total, the probability of defeating Bowser can be calculated using the binomial distribution.
The binomial distribution formula is given by P(X=k) = C(n, k) * p^k * (1-p)^(n-k), where:
P(X=k) is the probability of getting k successes,
C(n, k) is the number of ways to choose k successes out of n trials,
p is the probability of success in a single trial, and
(1-p) is the probability of failure in a single trial?
In this case, n (the number of trials) is 3, k (the number of successes) can vary from 0 to 3, and p (the probability of success) is 0.41. We can calculate the probabilities of different outcomes using the binomial distribution formula.
(b) To find the probability that only 1 of the 3 players defeats Bowser, we need to consider three possible scenarios: Player 1 defeats Bowser while Player 2 and Player 3 fail, Player 2 defeats Bowser while Player 1 and Player 3 fail, or Player 3 defeats Bowser while Player 1 and Player 2 fail.
Using the probabilities from the binomial distribution, we can calculate the probability of each individual scenario and then sum them up to get the final probability.
Let's denote the probability of Player 1 defeating Bowser as P1, the probability of Player 2 defeating Bowser as P2, and the probability of Player 3 defeating Bowser as P3. The probability that only 1 of them defeats Bowser can be calculated as:
P(1 out of 3 players defeats Bowser) = P1 * (1-P2) * (1-P3) + (1-P1) * P2 * (1-P3) + (1-P1) * (1-P2) * P3
Substituting the values of P1, P2, and P3 with 0.41 and performing the calculations will give us the desired probability.
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[5] Evaluate 4x - 5 for x = 10 (A) 20 (B) 9 (C) 35 (D) 8
Answers
Answer:
C) 35
Step-by-step explanation:
1) replace x with 10
2) 4(10)-5
3) 35
Given:-
x = 104x - 5 --- eqⁿSolution:-
\( \frak{4x - 5}\)\( \: \)
\( \frak{4(10) - 5}\)\( \: \)
\( \frak{40 - 5}\)\( \: \)
\( \underline{ \boxed{ \red{ \frak{ \: 35 \: }}}}\)\( \: \)
hope it helps! :)
1. Let G be a group and H be a nonempty subset of G that is closed under the binary operation of G. Then H is a subgroup of G. a. True b. False 2. Given the following statements. Statement A: Every cyclic group is abelian. Statement B: The order of the cyclic group is the same as the order of its generator. Choose the correct option. a. A and B are true. b. Both A and B are false. c. A is true but B is false. d. A is false but B is true. 3. The set of all real numbers under the usual multiplication operation is not a group since a. Zero has no inverse. b. The identity element under the operation does not exist. c. Multiplication is not a binary operation on the set. d. Multiplication is not satisfying the associativity property.
Answers
The correct answer is a)True c)True The order of the cyclic group is determined by the number of elements in the group, whereas the order
a. True. If a nonempty subset H of a group G is closed under the binary operation of G, contains the identity element of G, and contains the inverse of each of its elements, then H is a subgroup of G.
c. A is true but B is false. Every cyclic group is indeed abelian, but the order of the cyclic group is not necessarily the same as the order of its generator. The order of the cyclic group is determined by the number of elements in the group, whereas the order of the generator refers to the smallest positive exponent that generates all elements of the group.
a. Zero has no inverse. In the set of real numbers under the usual multiplication operation, the element zero does not have a multiplicative inverse. Every nonzero real number has an inverse, but zero itself does not. In a group, every element should have an inverse, so the set of all real numbers under multiplication does not form a group.
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1. If y is directly proportional to x and y = 6 when
x = 2,
(i) express y in terms of x,
(ii) find the value of y when x = 11,
(iii) calculate the value of x when y = 12,
(iv) draw the graph of y against x
Answers
If y is exactly proportional to x, then the value of y at x=16 is 40 if y=5 when x=2.
What is direct proportion?The definition of "direct proportion" uses the phrase "when the relationship between two quantities is such that if we increase one, the other will likewise grow, and if we lower one, the other quantity will also drop."Take the scenario where x and y are two quantities, where x is the quantity of candy and y is the total amount of money paid, as an example.If we buy more sweets, we will spend more money, and if we buy less candies, we will pay less money. We can therefore say that x and y are directly proportional to one another in this situation. The symbol for it is x y. Additionally, direct proportion and direct variation are used.\(&y \propto x \\\)
\(&y=k x\)
When x = 2, y = 5
\(&5=k(2) \\\)
therefore
\(k=\frac{5}{2}\)
When x = 16,
\(&y=\left(\frac{5}{2}\right) \\\)
y = 40
Hence, If y is exactly proportional to x, then the value of y at x=16 is 40 if y=5 when x=2.
The complete question is:
If y is directly proportional to x and y=5 when x=2, what is the value of y when x=16?
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What does => mean in logic?
Answers
The comparison operator "≥" in logic means that the number is either greater than or equal to a number , the greater than equal to symbol is used to describe the relationship between two terms .
What is a Comparison Operator ?
The Comparison operator in logic is used to compare logic statements ,such as \(a > b\) or \(a < b\) , by using a , b as variables, the operator compares their values, returns true and false.
The Comparison Operator "≥" , in logic is read as " greater than equal to" , For Example : if the statement is \(a \geq b\) , then if the variable is greater than or equal to b , then the operator will return TRUE and if not then it will return FALSE .
The given question is incomplete , the complete question is
What does the comparison operator "≥"(greater than equal to) mean in logic ?
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Convinced that she could do well as a competitor, Emma tracked the scores on a TV game show over the course of a week. Scores on a TV game show 5 6 7 8 9 10 Score Which score did the greatest number of people receive
Answers
Answer:
Since each score appears only once, there is no score that appears more frequently than the others. There is no mode for this data set.
Step-by-step explanation:
The score that the greatest number of people received is the mode of the data set. In this case, the mode is the score that appears most frequently.
Looking at the data set, we see that the score of 5 appears once, the score of 6 appears once, the score of 7 appears once, the score of 8 appears once, the score of 9 appears once, and the score of 10 appears once.
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Intellectually gifted people score in the top _____ percent on a standard IQ test.
A. 10
B. 5-10
C. 5
D. 1-2
Answers
Intellectually gifted people score in the top 1 - 2percent on a standard IQ test.
How to complete the blank in the statementFrom the question, we have the following parameters that can be used in our computation:
IQ of intellectual gifted people
The general rule is that
People with intellectuals are usually ranked high and the range is usually small
Next, we test the options
A. 10
The top 10% has a high range
B. 5-10
The top 10% omits people in top 5%
C. 5
The top 5% has a high range
D. 1-2
This has a small range and it is the highest
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6. in an experiment, the variable hypothesized to be the cause is called the , and the variable hypothesized to be affected is called the .
Answers
the variable hypothesized to be the cause is called the independent variable , and the variable hypothesized to be affected is called the dependent variable
What are variables?
A variable is defined as any property, number, or number of items that can be counted or measured. A variable is also known as a data item.
Dependent variables are so designated in spite of the thought that their values are to be investigated in a laboratory activity.
This can be done under the presumption or requirement that they are dependent on the value of other variables due to some law or rule.
A dependent variable is one that changes as a result of the independent variable's manipulation.
It is the desired outcome, and it is dependent on your independent variable. In statistics, dependent variables are often referred to as output responses.
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The sum of two numbers is 39. The larger number is 11 more than the smaller number. What are the numbers?
Larger number: ?
Larger number: ?
Answers
Answer:
Larger number = 25
Smaller number = 14
Step 1. Establish variables and system of equations
Larger number = x
Smaller number = y
&
x + y = 39
y + 11 = x
Step 2. Isolate a variable in ONE equation
x + y = 39
y = 39 - x
Step 3. Substitute that into the OTHER equation to find x
y + 11 = x
(39 - x) + 11 = x
50 - x = x
50 = 2x
25 = x
Step 4. Substitute that into the OTHER equation to find y
x + y = 39
(25) + y = 39
y = 14
Hope this helps!
Small: 14
i did. this for test practice in class on Friday!
In the shown figure, DE←→
is parallel to side BC¯¯¯¯¯¯¯¯
in triangle ABC
. If m∠B=52
°, what is m∠DAB
?
m∠DAB
=
°
Answers
Answer:
In triangle ABC, m∠BAC = 50°. If m∠ACB = 30°, then the triangle is triangle. If m∠ABC = 40°, then the triangle is triangle. If triangle ABC is isosceles, and AB = 6 and BC = 4, then AC =
Answer:
52 degrees
Step-by-step explanation: because i looked and they looked the same so i put 52 and it was right
calculate the area, in square units, bounded above by x=−9−y−−−−√ 3 and x=−12y 6 and bounded below by the x-axis.
Answers
The area bounded above by the curves x = -9 - √(3y) and x = -12y and below by the x-axis is 24 square units.
What is the area enclosed by the curves x = -9 - √(3y) and x = -12y, with the x-axis as the lower boundary?The given problem asks us to calculate the area enclosed by two curves. The upper curve is represented by the equation x = -9 - √(3y), while the lower curve is defined by x = -12y. The region we are interested in lies below the x-axis. To find the area, we need to determine the points where the curves intersect. Setting the two equations equal to each other, we get -9 - √(3y) = -12y. By solving this equation, we find y = -1/3 and y = -3. These values represent the y-coordinates of the points of intersection. Next, we integrate the difference between the two curves with respect to y, from y = -3 to y = -1/3. After evaluating the integral, we find that the area enclosed by the curves and the x-axis is 24 square units.
By delving deeper into calculus and practicing with similar exercises, you can enhance your problem-solving skills and gain a stronger grasp of mathematical principles. Keep exploring and practicing to become more proficient in finding areas bounded by curves and tackling a variety of mathematical challenges.
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8. The table shows the number of different
kinds of sodas sold at a gas station on a
Monday.
A.
B.
Kind of Soda
18
If the gas station had 80 customers on
Tuesday, how many customers can be
predicted to get a Dr. Pepper?
C. 45
Coks
Sprite
Dr. Papper
7-Up
36
Number of
Bottles Sold
11
D. Not Here
Answers
Hi if anyone is active can you tell me how to find the distance i’m kind of struggling in the unit of math:(
Find the distance between: -14.5 and 13
Answers
Answer:
I'm not sure :(
Step-by-step explanation:
I'm sorry
f(x) = 3^x-9. find the inverse of f(x). ASAP I NEED HELP LAST QUESTION AND 15 MINS LEFT
Answers
Answer:
A
Step-by-step explanation:
Given :
f(x) = ³√[ x - 9 ]And we need to find the inverse of the given function. We can do it by Firstly Interchanging x and y.
So that ,
\(:\implies\) f(x) = y
\(:\implies\) y = ³√[ x - 9 ]
\(:\implies\) x = ³√[ y - 9 ]
\(:\implies\) x³ = y - 9
\(:\implies\) y = x³ + 9
\(:\implies\) f-¹(x) = x³ + 9
Hence option A is correct .
What is the solution to 2/3(9x-6)=4(x+2)+ 2 round to the nearest hundredth
Answers
Answer:
7
Step-by-step explanation:
First expand 2/3 (9x-6) = 4 (x+2)+ 2 By doing 2/3 (9x - 6)/3
Which gives you 2/3 (9x - 6)
Then you factor it 2/3 (9x - 6) 6 (3x - 2) get 6 (3x - 2) / 3
then you divide 6/3 with 2
Getting 2 (3x - 2)
The use the distributive law
2 x 3x - 2 x 2
simplify the equation
6x - 4
expand 4 (x +2) + 2: 4x + 10
which then equals 6x-4=4x+10
add 4 to both sides
6x-4+4=4x+10+4
simplify
6x=4x+14
subtract 4x from both sides
simplify again
2x=14
divide both sides by 2
2x/2 = 14/2
simplify one last time and get the answer
x=7
The box plots display measures from data collected when 20 people were asked about their wait time at a drive-thru restaurant window.
A horizontal line starting at 0, with tick marks every one-half unit up to 32. The line is labeled Wait Time In Minutes. The box extends from 8.5 to 15.5 on the number line. A line in the box is at 12. The lines outside the box end at 3 and 27. The graph is titled Super Fast Food.
A horizontal line starting at 0, with tick marks every one-half unit up to 32. The line is labeled Wait Time In Minutes. The box extends from 9.5 to 24 on the number line. A line in the box is at 15.5. The lines outside the box end at 2 and 30. The graph is titled Burger Quick.
Which drive-thru is able to estimate their wait time more consistently and why?
Burger Quick, because it has a smaller IQR
Burger Quick, because it has a smaller range
Super Fast Food, because it has a smaller IQR
Super Fast Food, because it has a smaller range
Answers
The requried Burger Quick is able to estimate its wait time more consistently because it has a smaller IQR. Option A is correct.
What is a box plot?A straightforward method of expressing statistical data on a plot in which a rectangle is drawn to represent the second and third quartiles, with a vertical line inside to indicate the median value.
Here,
Burger Quick is able to estimate its wait time more consistently because it has a smaller interquartile range (IQR). The IQR is a measure of the spread of the middle 50% of the data and is calculated as the difference between the third quartile (Q3) and the first quartile (Q1). The smaller the IQR, the more consistent the data is around the median, which is represented by the line within the box in the box plot.
In this case, Burger Quick has a smaller IQR (8.0) compared to Super Fast Food (7.0), indicating that the wait times at Burger Quick are more consistent around the median. The range, which is the difference between the maximum and minimum values, is not a good measure of consistency as it is affected by outliers.
Therefore, based on the given information, Burger Quick is able to estimate its wait time more consistently because it has a smaller IQR.
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A paper company needs to ship paper to a large printing business. The paper will be shipped in small boxes and large boxes. The volume of each small box is 8 cubic feet and the volume of each large box is 21 cubic feet. A total of 20 boxes of paper were shipped with a combined volume of 264 cubic feet. Determine the number of small boxes shipped and the number of large boxes shipped.
Answers
Answer:14
Step-by-step explanation: so if you add 21 and 264 and 20 u would get 14 hehehehhehehe im da best your not :)
Write an explicit formula for a subscript n, the nth term of the sequence 100, -2, 4,...
Answers
The nth term of the sequence 100 is 592
What is a geometric sequence and how to find its nth terms?Suppose the initial term of a geometric sequence is a
and the term by which we multiply the previous term to get the next term is r
Then the sequence would look like
\(a, ar, ar^2, ar^3, \cdots\)
(till the terms to which it is defined)
Thus, the nth term of such sequence would be \(T_n = ar^{n-1}\) (you can easily predict this formula, as for nth term, the multiple r would've multiplied with initial terms n-1 times).
Given;
Sequence=-2,4...
D=4-(-2)
=6
Now, we have to find 100th term
So, n=100
an = a + (n – 1)d
=-2+(100-1)6
=-2+99x6
=592
Therefore, the answer of given sequence will be 592
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help pls ;;-;; ye thxs
Answers
Answer:
You still need help? :P
Step-by-step explanation:
Today only, a sofa is being sold at a 62% discount. The sale price is $311.60.
What was the price yesterday?
Answers
Answer:
The original price was $820.00
Step-by-step explanation:
820-62%=311.60
Hope this helped!
Which of the diagram represents the inequality -1
Answers
Solid lines are only used if the inequality INCLUDES that number.
In this case, x has to be greater than -1 and less than 1, but not equal to them.
у = 3х +8
What is the x-intercept?
Answers
Answer:
-8/3
Step-by-step explanation:
To solve for x-intercept, we set y as 0.
0 = 3x + 8
-8 = 3x
-8/3 = x
The x-intercept of the line is -8/3.
Answer:
Brainliest!!!
Step-by-step explanation:
find the values of a and b that make f continuous everywhere
Answers
It is possible to choose a and b such that the value of function(x) at any given point is equal to the limit of f(x) as x approaches any value. This guarantees that f is continuous throughout.
A function's limit as x approaches any value must match the value of f(x) at that moment in order for the function to be continuous everywhere. In order to ensure that this need is satisfied, the values of a and b that make up f(x), whether it be a linear equation, polynomial, or another sort of equation, must be chosen. Since the behaviour of the function varies smoothly as x approaches any value, this ensures that the function is continuous throughout. In other words, a and b values must be selected in a way that the function is continuous, i.e., defined and devoid of breaks or discontinuities.
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The complete question is
Find the values of a and b that make f continuous everywhere that f is continuous throughout.
The sum of 43. 5 and a number is no greater than 50. Why are all possible values of n
Answers
The possible value of n based on mentioned numbers and its sum is 6.5
Let us assume the number to be n. Now, the expression that will form is -
43.5 + n < 50
Now, rearranging the equation according to n in equation
n < 50 - 43.5
Performing subtraction on Right Hand Side of the equation to find the value of n
n < 6.5
Based on information in question, the number will be 6.5. To cross-check, we can see that sum of 43.5 and 6.5 is 50.
Apart from that, if the total varies, the value of n will also vary. However, it should be remem that n will not be less than 0 if total is positive.
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The complete question is -
The sum of 43. 5 and a number is no greater than 50. What are all possible values of n?