Answer:
1,2,5,10
Step-by-step explanation:
how large a sample is necessary for the bound on the error of estimation of the 90onfidence interval to be 3000? enter the minimum appropriate value. (give your answer as a whole number.)
The minimum sample size necessary for the bound on the error of estimation of the 90% confidence interval to be 3000 is 7.331 times the sample variance.
To calculate the minimum sample size necessary for the bound on the error of estimation of the 90% confidence interval to be 3000, a formula can be used:
n = [(z-value)² * s²] / E²
where n is the sample size, z-value is the critical value of the standard normal distribution at the desired confidence level (in this case, 90%), s is the sample standard deviation, and E is the margin of error.
Since we are given that the bound on the error of estimation is 3000, we can plug in E = 3000 into the formula and solve for n:
n = [(z-value)² * s²] / E²
n = [(1.645)² * s²] / (3000)²
n = (2.705)² * s² / 9,000,000
n = 7.331 * s²
Therefore, the minimum sample size necessary for the bound on the error of estimation of the 90% confidence interval to be 3000 is 7.331 times the sample variance.
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which number has a value between -8.423 and -8.395 number line
A polynomial p has zeros when x = 5,2 = -1, and 2
1
4
What could be the equation of p?
Answer:
apolynomial p has zeros
Answer:
p(x)=(x-5)(x+1)(4x+1)
-x+2y=3 2x+y=4 can someone help me
Answer:
if we're trying to work out x and y then
x= 1
y= 2
-1+4=3
2+2=4
Answer:
x =1, y=2 hope this helpss
Step-by-step explanation:
6c=2(3c-4)+2c
what is the step by step solution to this equation
i'll do it step-by-step here. if there's any step that doesn't make sense, feel free to let me know!
6c = 2(3c-4) + 2c
distribute the 2 among the terms in the parentheses first.
6c = 6c - 8 + 2c
because both sides have 6c, we can cancel them out. 6c - 6c = 0.
0 = -8 + 2c
move the 8 to the other side (+8 to both sides).
8 = 2c
divide both sides by 2.
8/2 = c
therefore, 4 = c.
hope i helped! good luck.
I need the answer pls it is due in 10 minutes
Answer:
she never brought her cost up when they got another cup cake it should
x y
1 3.50
2 7
3 10.50
4 14
i ant really graph them
Step-by-step explanation:
if you flip two coins 52 times, what is the best prediction possible for the number of times both coins will land on heads?
Answer:
13 times
Step-by-step explanation:
lol, I actually did this right now. I got 13 times for both coins being heads, 9 times for each coin being tales, and exactly 30 times both were uneven. I hope this helps :)
Help if you can!! I really need some good grades or I will fail on this and that wont help anything.
Answer: 6 1/8
Step-by-step explanation:
Each x on the line represents one piece of string that long. For example, since there is one x at 1/8, she cut one piece of string 1/8 ft long. So you take all the values and add them up:
1/8+2/4+2/4+2/4+2/4+5/8+3/4+3/4+7/8
then find a common denominator (so make everything over 8)
1/8+4/8+4/8+4/8+4/8+5/8+6/8+6/8+7/8 = 41/8
when you divide this, you will get 5 1/8
since theoriginal problem says she still has 1 foot leftover, you add one to get the total value when she started.
So, Emma had 6 1/8 ft string originally
the width of a confidence interval for a population mean depends on group of answer choices the sample proportion. the population size. the level of confidence chosen. the sample mean.
The width of a confidence interval for a population mean depends on group of answer choices the sample proportion is population size and sample mean .
Given :
What is population size ?
population is the entire set of items from which you draw data for a statistical study. It can be a group of individuals, a set of items, etc.
What is sample mean ?
The sample mean from a group of observations is an estimate of the population mean .
so the width of a confidence interval is dependent on population size and sample mean .
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Which of the following is true of a quasi-experiment?
Group of answer choices
We can balance participant variables between groups in a quasi-experiment.
In a quasi-experiment, the researcher assigns participants to conditions based on the particpant’s preexisting level of the independent variable.
In a quasi-experiment, the researcher randomly assigns participants to groups.
A quasi-experiment allows us to infer causality more accurately.
The true statement about the quasi-experiment is , the researcher assigns participants to conditions based on the participant's preexisting level of the independent variable.
In a quasi-experiment, the researcher assigns participants to conditions based on the participant's preexisting level of the independent variable. However, unlike a true experiment, a quasi-experiment cannot control for all possible confounding variables and may not allow for the balancing of participant variables between groups. Therefore, while a quasi-experiment can provide some evidence of causality, it may not be as accurate as a true experiment in this regard.
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In a quasi-experiment, the researcher assigns participants to conditions based on the participant’s preexisting level of the independent variable.
A quasi-experiment is a research design that lacks the control of random assignment to groups. Instead, the researcher assigns participants to conditions based on pre-existing levels of the independent variable. This means that the groups may not be equivalent at the outset, and there is a greater risk of confounding variables affecting the results.
Therefore, we cannot balance participant variables between groups in a quasi-experiment, nor can we randomly assign participants to groups. While quasi-experiments can provide valuable information, they do not allow us to infer causality more accurately than other research designs.
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PLEASE HELP EASY MATH!!!!
Answer: 20 cubic feet
Step-by-step explanation:
I did the math
Hope this helps!!
Solve 14+3n=5n−6 . Check your solution.
n= __
Answer:
N = 10
Step-by-step explanation:
Subtract 3n from both sides
14 = 2n - 6
add 6 to both sides
20 = 2n
divide by 2
n = 10
Answer:
n = 10
I hope this helps!
if 60% of a number is 90, what is 4/5 of the number
Answer:
120
Step-by-step explanation:
To solve this, we can first find the value of the number.
Let's name the number x.
We can set up a proportion to solve.
90/60=x/100
Simplify.
9/6=x/100
Cross multiply.
6x=900
Divide both sides by 6.
x=150
The original number is 150.
Let's find 4/5 of that.
4/5*150
Multiply.
600/5
Divide.
120
________________________________
Hey!!!
Solution,
Let the number be X
60% of X=90
or,60/100*X=90
or,3/5*X=90
or,X=90/3/5
or,X=90*5/3
or,X=450/3
X=150
Again,
4/5 of X
=4/5*150
=120
The answer is 120
hope it helps
Good luck on your assignment
_____________________________
Which of the following sets of values has the greatest
variability?
Group of answer choices
A) 1, 4, 7, 9, 11
B) 2, 2, 3, 3, 4
C) 7, 7, 8, 9, 9
D) 2, 3, 5, 7, 8
A triangle weighs six how much does a square away
Answer:
12
Step-by-step explanation:
triangle is half a square so 6*2 = square = 12
A dog won a race at the local fair by running 13 1/4 miles in exactly hours. At this constant rate, how long does it take the same dog to run the 5 3/10-mile state fair race? Use ratio reasoning to solve.
that is really hard thinking
Multiply (5.6 x 10") (6.1 x 10* )and write the
answer in scientific notation.
Answer:
3.416 x 10^(" + * + 1)
Step-by-step explanation:
The exponents of (5.6 x 10") (6.1 x 10* ) seem incorrect. Whatever they are, do the following:
1) multiply 5.6 times 6.1. Result = 34.16
Add the two exponents: (" + *)
The result is 34.16 x 10^(" + *)
Then move the decimal point one to the left and add 1 to the 10 exponent:
3.416 x 10^(" + * + 1)
This circle graph shows the percent of land occupied by each continent.
The area of North America is approximately 220 million km2
.
Use the percents in the circle graph.
Find the approximate area of each of the other continents,
to the nearest million square kilometres.
The approximate areas of the continents (excluding North America) are as follows:
- Australia: 11 million km^2
- Europe: 15 million km^2
- Antarctica: 18 million km^2
- South America: 26 million km^2
- Africa: 44 million km^2
- Asia: 66 million km^2
To find the approximate area of each continent, we will multiply the given percentages by the area of North America (220 million km^2).
1. Australia:
Percentage: 5%
Approximate area: 0.05 * 220 million km^2 = 11 million km^2
2. Europe:
Percentage: 7%
Approximate area: 0.07 * 220 million km^2 = 15.4 million km^2 (rounded to 15 million km^2)
3. Antarctica:
Percentage: 8%
Approximate area: 0.08 * 220 million km^2 = 17.6 million km^2 (rounded to 18 million km^2)
4. South America:
Percentage: 12%
Approximate area: 0.12 * 220 million km^2 = 26.4 million km^2 (rounded to 26 million km^2)
5. Africa:
Percentage: 20%
Approximate area: 0.20 * 220 million km^2 = 44 million km^2
6. Asia:
Percentage: 30%
Approximate area: 0.30 * 220 million km^2 = 66 million km^2
Note: These values are rounded to the nearest million square kilometers.
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factor completely the polynomial: 21a+8xy^3-24y^2-7axy
Answer:
Your answer......
FACTOR: (7a-8y^2)(3-xy)
WANT MORE THEN FOLLOW ME, LIKE & MARK MY ANSWER AS BRAINLIST ANSWER
Answer:
(7ay-8y^2)(3-xy)
Step-by-step explanation:
Its the correct answer
A line passes through the points (1, 4) and (3 -4). Which is the equation of the line?
Answer:
Step-by-step explanation:
(-4 - 4)/(3 - 1)= -8/2= -4
y - 4 = -4(x - 1)
y - 4 = -4x + 4
y = -4x + 8
answer is option 1
A set of data has a normal distribution with a mean of 29 and a standard deviation of 4 . Find the percent of data within each interval.greater than 29
The percent of data within the interval greater than 29 is 0.5 or 50%.To find the percent of data within an interval greater than 29 in a normal distribution with a mean of 29 and a standard deviation of 4, we can use the z-score formula and the standard normal distribution table.
First, we need to calculate the z-score for 29. The z-score formula is given by: z = (x - μ) / σ, where x is the given value, μ is the mean, and σ is the standard deviation.
In this case, the z-score for 29 is (29 - 29) / 4 = 0.
Since we want to find the percent of data greater than 29, we need to find the area under the curve to the right of the z-score of 0.
Using the standard normal distribution table or a calculator, we can find that the area to the right of z = 0 is 0.5.
Therefore, the percent of data within the interval greater than 29 is 0.5 or 50%.
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Arthur has 6 more than 5 times the number of pencils as Jenny. If Arthur and Jenny combined have 30 pencils, how many pencils does Jenny have?
Answer:
Jenny has 4 pencils.
Step-by-step explanation:
Let
Jenny has pencils = x
Arthur has pencils = 5x+6 (Arthur has 6 more than 5 times the number of pencils as Jenny. )
Total pencils = 30
We need to find how many pencils does Jenny have.
We basically can write the equation:
Total pencils = Jenny pencils + Arthur pencils
Putting values and solving to find value of x:
\(30=x+5x+6\\30=6x+6\\30-6=6x\\24=6x\\=> 6x=24\\x=\frac{24}{6}\\x=4\)
So, we have value of x = 4
Now, finding number of Jenny pencils:
Jenny has pencils = x = 4
Therefore, Jenny has 4 pencils.
Solve the piven differential equatice by separation of variables. dy - (y-2)^2 dx = 0
To solve the given differential equation by separation of variables, we'll rearrange the equation and integrate both sides.
Starting with the given differential equation:
dy - (y - 2)^2 dx = 0
Rearranging the terms:
dy = (y - 2)^2 dx
Now, we can separate the variables:
dy / (y - 2)^2 = dx
Integrating both sides:
∫ dy / (y - 2)^2 = ∫ dx
Let's evaluate the integrals separately.
For the left-hand side:
∫ dy / (y - 2)^2
Using a substitution, let u = y - 2. Then, du = dy.
The integral becomes:
∫ du / u^2
Integrating, we have:
-1 / u = -1 / (y - 2)
Now, for the right-hand side:
∫ dx = x + C
Combining the results:
-1 / (y - 2) = x + C
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What is the equation of the line that passes through the point (-1, -5) and has a
slope of -12
Answer:
Thus, the equation of a line is: y = -12x-17
Step-by-step explanation:
point = (-1, -5) slope = -12Using the point-slope form
\(y-y_1=m\left(x-x_1\right)\)
where m is the slope, and (x₁, y₁) is the point
substituting the values m = -12 and the point (-1, -5)
\(y-y_1=m\left(x-x_1\right)\)
y-(-5) = -12(x-(-1))
y+5 = -12 (x+1)
y+5 = -12x-12
y = -12x-12-5
y = -12x-17
Thus, the equation of line is: y = -12x-17
Medical researchers have determined that for exercise to be beneficial, a person’s desirable heart rate, r, in beats per minute, can be approximated by the formulas r = 143 minus 0.65 a for women r = 165 minus 0.75 a for men, where a represents the person’s age. if the desirable heart rate for a man is 135 beats per minute, how old is he? a. 22.5 years old b. 40 years old c. 45 years old d. 42.5 years old
Age will be 40 years old.
R, in beats per minute, can be approximated by the formulas, where a represents the person's age.
where R= 143 - 0.65a for women.... (1)
and R= 165 - 0.75a for men,..... (2)
So by implementing these two equation we get a = 40
If the sum of ages is X and Y, and the ratio of their ages is p:q, then the age of Y can be calculated using the formula shown below: Y's age = Y's ratio/Sum of ratios x sum of ages The age dependency ratio is the ratio of dependents (people under the age of 15 or over the age of 64) to the working-age population (people between the ages of 15 and 64). The proportion of dependents per 100 working-age population is shown in the data.
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GIVING BRAINLIST PLEASE HELP
Answer:
x>-6
Step-by-step explanation:
Subtract 8 from both sides.
2x+8−8>−4−8
2x>−12 Divide both sides by 2.
x>-6
Answer: A) “Two X Plus 8 Is Greater Than Negative Four”
B) 2x + 8 > -4, Then subtract 4 from 8 so now it is 2x > -12. Then divide -12 by 2. Your answer will be X > -6 I hope that this helps you
Step-by-step explanation:
What is 3.24 (.24 repeating) as a simplified fraction?
As a simplified fraction, we have 107/33
How to determine the fractionNote that fractions are simply described as the part of a whole number or variable.
There are different types of fractions;
Mixed fractionsProper fractionsImproper fractionsSimple fractionsFrom the information given, we get;
3. 24 repeating can be expressed as the sum of 3 and 0. 24
Let x be 3.24
Then, we have;
Multiplying 100 by a certain number results in a repeating decimal of 324. 24
100x = 324.24
After taking the difference between the two equations, we have;
99x = 321.
Make 'x' the subject of formula, we have;
x = 321/99
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PLS HELP, WILL GIVE BRAINLIEST AND POINTSSSSSS
i'm rlly confused on this, I think maybe it's .D???
Pls someone answer and explain!!!
and no links, please and thankyou
Answer:
i think your right - it might me d cause woudn't the gravity and the surface cancel out and the force would make it move because there is no opposite force i donkt know tho
By definition, when a test or technique measures what it intends to, it is a. valid. b. reliable. c. significant. d. generalizable.
By definition, when a test or technique measures what it intends to, it is valid.
The answer is option A.
The criterion-related validity of a take-a-look is measured by the validity coefficient. Its miles said as a number between zero and 1.00 that indicates the significance of the relationship, "r," among the take a look at and a measure of task overall performance (criterion).
Reliability and validity are both approximately how nicely a technique measures something: Reliability refers to the consistency of a measure (whether or not the consequences can be reproduced below identical situations).
Validity refers back to the accuracy of a measure (whether or not the results really do constitute what they may be speculated to a degree).
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What is 1+1? Answer please
Answer:
1+1=2
Step-by-step explanation:
Yess!!!! I have solved this biggest problem....lol
Answer: 2
Step-by-step explanation: if I were to draw 1 circle then add another circle. Then I would count the circles and get 2.