Answer:
40% I believe
Step-by-step explanation:
I searched it up
Test the claim about the population variance sigma σ2 at the level of significance α. Assume the population is normally distributed. Claim: sigma σ2 less than or equals≤ 16.6; α=.10 Sample statistics: s2=25.98, n=51
Based on the given sample statistics (s²=25.98, n=51), the test statistic (χ²) should be calculated using the formula (n - 1) * s² / σ², and then compared to the critical value for the chi-square distribution with (n - 1) degrees of freedom at a significance level of α = 0.10 to determine whether to reject the null hypothesis or not.
What is the test statistic (χ²) and critical value for the chi-square test of variance, given the sample statistics (s²=25.98, n=51) and a significance level of α = 0.10?To test the claim about the population variance σ² at the significance level α, we can use the chi-square test. Here's how you can perform the test with the given information:
State the null and alternative hypotheses:
The null hypothesis (H₀) is that the population variance σ² is greater than 16.6.
H₀: σ² > 16.6
The alternative hypothesis (H₁) is that the population variance σ² is less than or equal to 16.6.
H₁: σ² ≤ 16.6
Select the significance level (α):
The given significance level is α = 0.10 (or 10%).
Compute the test statistic:
The test statistic for the chi-square test of variance is given by:
χ² = (n - 1) * s² / σ²
Where:
n = sample size (51)
s² = sample variance (25.98)
σ² = population variance (claim value, 16.6)
Using the given values, we can calculate the test statistic:
χ² = (51 - 1) * 25.98 / 16.6
Determine the critical value:
The critical value for the chi-square test depends on the degrees of freedom and the significance level. Since we are testing a one-tailed hypothesis (σ² ≤ 16.6), we will use the lower tail of the chi-square distribution.
The degrees of freedom for the chi-square test of variance is given by (n - 1). In this case, it is 50 (51 - 1).
Using a chi-square distribution table or a calculator, you can find the critical value for α = 0.10 and 50 degrees of freedom.
Make a decision:
If the test statistic (χ²) is less than the critical value, we reject the null hypothesis. Otherwise, we fail to reject the null hypothesis.
Compare the test statistic (χ²) to the critical value. If χ² < critical value, reject the null hypothesis. Otherwise, fail to reject the null hypothesis.
Interpret the decision:
Based on the comparison of the test statistic and the critical value, you can determine whether to reject or fail to reject the null hypothesis.
If the null hypothesis is rejected, it provides evidence to support the alternative hypothesis. If the null hypothesis is not rejected, there is not enough evidence to support the alternative hypothesis.
Please note that I am unable to provide the exact critical value without access to a chi-square distribution table or calculator. However, by following the steps above, you should be able to perform the test and interpret the results using the provided information.
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A right square pyramid has an altitude of 10 and each side of the base is 6. To the nearest tenth of a centimeter, what is the distance from the apex, or top of the pyramid, to each vertex of the base?.
We need to use the properties of Pyramid and Right Angled Triangle in this question. The distance from apex to each vertex is 10.9.
How can we solve questions of pyramid?
A three-dimensional figure is a pyramid. Its base is a flat polygon. The remaining faces are all triangles and are referred to as lateral faces. The number of sides on its base is equal to the number of lateral faces. The line segments that two faces intersect to form its edges. The intersection of three or more edges forms a vertex. All the faces, with the exception of the base, join at the apex, a vertex at the top. The base's shape is given by the apex, which is located in opposition to it. In the right pyramid, the apex is precisely over the center of the base. The center of the base will be where a perpendicular line from the apex to the base intersects.
CalculationSo in the question they mentioned Altitude=10 and Base =6.
So using pythagorean theorem,
x2=y2+(10)2-eq1
with y half of the length of the diagonal of the base.
2y=length of the diagnol
and (2y)2 = 72
⇒4y2=72
∴y = 3√2.
So substitute y in eq1 and get x.
⇒ ( 3√2)2+(10)2=(x)2
⇒(x)2=118
∴x=10.86.
x≈10.9
We need to use the properties of Pyramid and Right Angled Triangle in this question. The distance from apex to each vertex is 10.9.
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What’s the biggest and lowest number you can get with the number x^2+4x+3=0
Answer:
To find the solutions of the equation x^2+4x+3=0, you can use the quadratic formula:
x = (-b +/- sqrt(b^2 - 4ac)) / (2a)
where a, b, and c are the coefficients of the quadratic equation. In this case, a = 1, b = 4, and c = 3. Plugging these values into the formula gives:
x = (-4 +/- sqrt(16 - 413)) / (2*1)
x = (-4 +/- sqrt(4)) / 2
x = (-4 +/- 2) / 2
This means the two solutions for x are (-4 - 2) / 2 = -3 and (-4 + 2) / 2 = -1.
So the biggest and lowest numbers you can get with the number x^2+4x+3=0 are -3 and -1, respectively.
Answer: The biggest number is x= -1 and
the lowest number is x= -3 .
Step-by-step explanation: Solution
or, x^2+4x+3=0
or, x^2+ ( 3+1 )x+3=0
or, x^2+3x + x +3=0
or, x (x + 3)+ 1(x + 3)=0
or, (x + 3) (x + 1)=0
Either,
(x + 3)= 0 , (x + 1)= 0
or, x= -3 , x= -1
Therefore, The biggest number is x= -1 and
the lowest number is x= -3 .
When we rewrite a fraction as a decimal, are we changing the value of the fraction? hi so my teacher is asking this question on this mini quiz thing and i have a horrible headache and dont feel like doing that right now. so pls help me out
Answer:
No, you are not changing the value.
Step-by-step explanation:
Answer:
No, because then it would have different values and it wouldn't be rewriting it.
Step-by-step explanation:
Ex. 1/2. The decimal for this would be 0.5, right?
We aren't changing the value of the fraction. It is just another way of writing the value.
Hope this helped. :)
Also, I hope your headache goes away. Feel better soon. :D
Hi, can someone please help me with this question, I'm a bit baffled.
Solve the simultaneous equations
3x−2y=27
3x−y=24
pleaseee help
WILL GIVE BRAINLIEST (PLEASE SHOW WORK)
Evaluate sec (11pi/6) without using technology
Find all the missing elements:C = 120°b = 5C = 11A = [?]° B = [ ]º a = [
ANSWERS
• A = 36.8°
,• B = 23.2°
,• a = 7.6
EXPLANATION
We can find B using the law of sines,
We have b = 5, c = 11 and C = 120°. Using the last two ratios,
\(\frac{b}{\sin B}=\frac{c}{\sin C}\)Rise both sides of the equation to -1 - i.e. flip both sides,
\(\frac{\sin B}{b}=\frac{\sin C}{c}\)Multiply both sides by b,
\(\sin B=\frac{b}{c}\sin C\)And take the inverse of the sine,
\(B=\sin ^{-1}\mleft(\frac{b}{c}\sin C\mright)\)Replace with the values and solve,
\(B=\sin ^{-1}\mleft(\frac{5}{11}\sin 120\degree\mright)\approx23.2\degree\)Then, knowing that the sum of the measures of all the interior angles of a triangle is 180°, we find A,
\(A+B+C=180\degree\)Solving for A,
\(A=180\degree-B-C=180\degree-23.2\degree-120\degree\approx36.8\degree\)Finally, let's find a using the law of sines with the first and last ratios,
\(\frac{a}{\sin A}=\frac{c}{\sin C}\)Solving for a,
\(a=c\cdot\frac{\sin A}{\sin C}=11\cdot\frac{\sin 36.8\degree}{\sin 120\degree}\approx7.6\)Hence, the missing elements are A = 36.8°, B = 23.2° and a = 7.6.
Which composition of transformations maps figure efgh to figure efgh?.
To determine the composition of transformations that maps figure efgh to figure efgh, we need to first identify the transformations involved.
A transformation is a change in position, size, or shape of a figure. In this case, we can see that figure efgh has not changed in size or shape, so the transformation must involve a change in position.
One possible transformation that could be involved is a translation, which involves moving the figure along a straight line without changing its size or shape. Another possible transformation is a rotation, which involves turning the figure around a fixed point.
To find the composition of transformations that maps figure efgh to itself, we need to experiment with different combinations of translations and rotations until we find one that works. For example, we could first rotate the figure 90 degrees clockwise around its center, and then translate it 2 units to the right and 3 units up. This composition of transformations would move figure efgh to a new position, but still maintain its size and shape.
Alternatively, we could first translate the figure 2 units to the right and 3 units up, and then rotate it 90 degrees counterclockwise around its center. This would also result in a new position for the figure, but with the same size and shape as the original.
In conclusion, there are multiple compositions of transformations that could map figure efgh to itself, including combinations of translations and rotations. It is important to experiment with different options and test them to ensure that they maintain the size and shape of the figure.
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Evaluate: a+b+a+a , where a=−5 and b=−5
pls help me!! I really need it!
Which statement about the function f(x)=x2−x−20 is true?The expression x2−x−20 has factors (x−5) and (x+4), and f(x) has zeros at x=−5 and x=4.The expression x 2 − − x − − 20 has factors ( x − − 5 ) and ( x + 4 ) , and f ( x ) has zeros at x = − − 5 and x = 4 .The expression x2−x−20 has factors (x−5) and (x+4), and f(x) has zeros at x=−4 and x=5.The expression x 2 − − x − − 20 has factors ( x − − 5 ) and ( x + 4 ) , and f ( x ) has zeros at x = − − 4 and x = 5 .The expression x2−x−20 has factors (x−4) and (x+5), and f(x) has zeros at x=−5 and x=4.The expression x 2 − − x − − 20 has factors ( x − − 4 ) and ( x + 5 ) , and f ( x ) has zeros at x = − − 5 and x = 4 .The expression x2−x−20 has factors (x−4) and (x+5), and f(x) has zeros at x=−4 and x=5.The expression x 2 − − x − − 20 has factors ( x − − 4 ) and ( x + 5 ) , and f ( x ) has zeros at x = − − 4 and x = 5 .
Answer: its C
Step-by-step explanation:
allison's small business earns $10,000 in january. she expects income to increase by 5 percent per month until the end of the year. to use excel to calculate monthly income from february to december, allison can fill a series with a trend
Answer:
Original Money Earned: $10,000
To increase this by 5 percent, we need to multiply $10,000 by 0.05 (5%).
$10,000 x 0.05 = $500
Allison makes $500 (5% of $10,000) per month, so you would add that to the sum of your answer after every previous month.
Now, let's add that.
Feb : $10,000 + 500 = $10,500
Mar : $10,500 + 500 = $11,000
Apr : $11,000 + 500 = $11,500
May : $11,500 + 500 = $12,000
Jun : $12,000 + 500 = $12,500
Jul : $12,500 + 500 = $13,000
Aug : $13,000 + 500 = $13,500
Sep : $13,500 + 500 = $14,000
Oct : $14,000 + 500 = $14,500
Nov : $14,500 + 500 = $15,000
Dec : $15,000 + 500 = $15,500
Allison can fill a series with a trend function in excel to calculate monthly income.
To calculate Allison's monthly income from February to December using Excel, you can use the fill series with a trend function.
1. Open a new Excel spreadsheet.
2. In cell A1, type "January" and in cell B1, type "$10,000" (without quotes) as Allison's January income.
3. In cell A2, type "February".
4. In cell B2, type the formula "=B1*1.05" (without quotes). This formula calculates the income for February by increasing January's income by 5 percent.
5. Click on cell B2 to select it, then move your cursor to the bottom right corner of the cell until the cursor changes into a small black cross.
6. Click and hold the left mouse button, then drag the cursor down to cell B12, which corresponds to December.
7. Release the left mouse button. Excel will fill the series with a trend, calculating the income for each month from February to December.
Hence, Excel is used to calculate Allison's monthly income from February to December, taking into account the expected 5 percent increase per month.
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please solve this question
The value of BA.BC vector is 18 cm² as side lengths are 6 cm.
What is triangle?A triangle is a closed two-dimensional geometric figure with three sides, three angles, and three vertices. It is one of the basic shapes in geometry and is formed by connecting three non-collinear points with straight line segments. The sum of the interior angles of a triangle is always 180 degrees, and there are various types of triangles, such as equilateral, isosceles, scalene, right-angled, acute-angled, and obtuse-angled triangles. Triangles are used in a wide range of applications, from architecture and engineering to physics and computer graphics.
Here,
To find the area of the AABC, we can use Heron's formula:
s = (AB + BC + CA)/2 = (6 + 6 + 6)/2 = 9
Area = √(s(s-AB)(s-BC)(s-CA))
= √(9(9-6)(9-6)(9-6))
= 27/4 cm²
To find the height of the AABC corresponding to side AB, we can use the formula:
Area = 1/2 * AB * height
Rearranging, we get:
height = 2 * Area / AB = 2 * 27/4 / 6 = 9/4 cm
Therefore, the area of AABC is 27/4 cm², and the height corresponding to side AB is 9/4 cm.
For the second part of the question, we can use the Law of Cosines to find the angle between sides BA and BC:
cos(A) = (BA² + BC² - CA²) / (2 * BA * BC)
= (6² + 6² - 6²) / (2 * 6 * 6)
= 1/2
A = arccos(1/2) = 60 degrees
Using this angle, we can find the length of side BA . BC:
BA . BC = 2 * AB * BC * cos(A)
= 2 * 6 * 6 * cos(60)
= 18 cm²
Therefore, BA . BC = 18 cm²
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huduko incorporated offers a number of computer services. one server handles its own web page. it receives requests for web pages at the rate of 79 per second. the standard deviation of these interarrival times is 0.02 second. what is the coefficient of variation of the interarrival times for this server?
Using the standard deviation value of these interarrival times, the coefficient of variation is 0.012.
What do you mean by Standard Deviation?The standard deviation is a statistic that expresses how much variance or dispersion there is in a group of numbers. While a high standard deviation suggests that the values are dispersed throughout a wider range, a low standard deviation suggests that the values tend to be close to the established mean.
What is Coefficient of variation and formula to calculate it?The standard deviation to mean ratio, or coefficient of variation (CV), illustrates the degree of variability in proportion to the population mean. The dispersion increases with increasing CV.
Formula is given by:
\(CV = \frac {\sigma}{\mu}\)
\(\sigma = 0.02\)
Mean for the time of 0.02 sec is = 79 * 0.02
=1.58
CV= 0.02/1.58
=0.012
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Evaluate this expression for a = 3 and b = 4.
B
(a + 4)-
3(3 + 2)
+
3 - 2
OA. 6
OB.
9
O C.
11
OD.
8
Answer:
14
Step-by-step explanation:
a = 3
b = 4
\(b(a + 4)-3(3 + 2)+3 - 2\\a = 3,b=4\\4(3+4)-3(5)+3 - 2\\4(7)-15+3 - 2\\28-14\\\\14\)
Which of the following graph shows one,non or infinite solution
Answer:
No graphs????????????
Step-by-step explanation:
help me please i need someone to convert the fraction 9/16 to a finite decimal the first person to answer will get a brainliest person
PLEASE HELP ME.
Answer: 0.5626
Step-by-step explanation:
just divide 9 by 16
2) Suppose it is known that 80% of the people exposed to the flu virus will contract the flu. Out of a family of six exposed to the virus, what is the probability that:
a) no one will contract the flu?
b) all will contract the flu?
c) at least two will contract the flu?
Answer:
a) .000064
b) .2621
c) .9984
Step-by-step explanation:
esta correcta confianza en me
xoxo, your highness...I NEED HELP QUICKLY PLEASE. POSSIBLY GIVING BRAINLIEST.
A computer technician charges a flat rate for home visits plus $ 55 per hour. The technician bills $190 for a 2-hour home visit to install a new hard drive. The equation y − 190 = 55(x − 2) gives the total amount y the technician charges for x hours of work.
The equation in slope-intercept form is y = 55x + 80.
What does the y-intercept in this equation represent?
a. the rate of change
b. the total cost
c. the flat rate
IT IS NOT A. I TRIED AND GOT IT WRONG.
Answer:
y - 190 = 55(x - 2)....distribute thru the parenthesis
y - 190 = 55x - 110....now add 190 to both sides
y = 55x - 110 + 190..simplify
y = 55x + 80 <== slope intercept form (y = mx + b)
i found this on brainly:)
Step-by-step explanation:
Answer:
the flat rate is the right answer on edge
Step-by-step explanation:
The graphs below have the same shape. What is the equation of the red
graph?
Answer:
\(G(x) = 6-x^{4}\)
Step-by-step explanation:
The red graph is the blue graph translated up 3 units, so the answer is \(G(x) = 6-x^{4}\).
The 2017 balance sheet of Kerber's Tennis Shop, Inc., showed long-term debt of $5 million, and the 2018 balance sheet showed long-term debt of $5.2 million. The 2018 income statement showed an interest expense of $165,000. During 2018, the company had a cash flow to stockholders for the year was $70,000. Suppose you also know that the firm’s net capital spending for 2018 was $1,370,000, and that the firm reduced its net working capital investment by $69,000. What was the firm’s 2018 operating cash flow, or OCF?
Griffin's Goat Farm, Inc., has sales of $686,000, costs of $332,000, depreciation expense of $65,000, interest expense of $48,500, and a tax rate of 24 percent. What is the net income for this firm?
The net income for Griffin's Goat Farm, Inc., was \(\$184,340\).
The operating cash flow (OCF) for Kerber's Tennis Shop, we can use the following formula:
\(OCF = EBIT + Depreciation - Taxes + \triangle Working Capital\)
where EBIT is earnings before interest and taxes.
Calculate EBIT by subtracting interest expense from operating income:
EBIT = Operating Income - Interest Expense
We do not have the information for operating income, but we can use the fact that interest expense was. \(\$165,000\) to calculate EBIT.
EBIT = Interest Expense / (1 - Tax Rate)
= \(\$165,000 / (1 - 0)\)
= \(\$165,000\)
Calculate the change in working capital (Δ Working Capital). We are told that the company reduced its net working capital investment by \(\$69,000\), which means that working capital increased by \(\$69,000\).
Therefore:
\(\triangle Working Capital = \$69,000\)
Now, we can calculate OCF:
OCF = EBIT + Depreciation - Taxes + Δ Working Capital
=\(\$165,000 + 0 - 0 +\ $69,000\)
=\(\$234,000\)
Therefore, the firm’s 2018 operating cash flow (OCF) was \(\$234,000\) .
To calculate the net income for Griffin's Goat Farm, we can use the following formula:
Net Income = EBIT - Interest Expense - Taxes
where EBIT is earnings before interest and taxes. We can calculate EBIT as:
EBIT = Sales - Costs - Depreciation
= \(\$686,000 - \$332,000 - \$65,000\)
=\(\$289,000\)
Next, we need to calculate taxes. We are given a tax rate of 24%, so:
Taxes = Tax Rate x (EBIT - Depreciation)
= \(0.24 \times (\$289,000 - \$65,000)= \$56,160\)
Now, we can calculate net income:
Net Income = EBIT - Interest Expense - Taxes
= \(\$289,000 - \$48,500 - \$56,160= \$184,340\)
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I am going to advance Neptune is 96 years from earth I tell you that 1 light year this distance of traveling light in a vacuum in the span of a year since light travels 299,792,458 light kilometers is a huge distance: it is equivalent to 9,460,730,472,580.8 km tell me if it is addition subtraction or what? and well if with the answer
Answer:
It is multiplication
Step-by-step explanation:
It is multiplication because when you divide 9,460,730,472,580.8 by 299,792,458 you will get 31557.6 so that means,
9,460,730,472,580.8/299,792,458 = 31557.6
so, 299,792,458 * 31557.6 = 9,460,730,472,580.8
So the answer is Multiplication by 31557.6
Let me know if it was Helpfull.
Find the slope of the line graphed below.
Answer:
3/4
Step-by-step explanation:
up 3 right 4
What is the slope of the line in the following graph?
1. 1/3
2. 1/2
3. 2
4. 3
Answer:
1. 1/3
Step-by-step explanation:
Slope = Rise/run
=> It rises by 1, then runs by 3
=> Therefore, slope = 1/3
Which of the following is an example of Commutative Property w.r.t. Addition ?A.5+ 9 = 9 + 5B. (9 + 2) + 8 = 9+ (2 + 8)C. 4+ 7 = 3 +4D. 6 x 1 = 6
The correct answer is A. 5 + 9 = 9 + 5 is an example of the commutative property of addition.
The commutative property of addition states that the order of the numbers being added does not affect the sum. In other words, for any two numbers a and b, a + b = b + a. In this example, 5 + 9 = 9 + 5, which shows that the order of the numbers being added does not change the sum.
B. (9 + 2) + 8 = 9+ (2 + 8) is an example of the associative property of addition.
C. 4+ 7 = 3 +4 is not an example of commutative property as its not true 4+7 != 3+4
D. 6 x 1 = 6 is an example of identity property of multiplication.
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find the vertex of the parabola 6x^2-2
Answer:
-2
Step-by-step explana
12.6÷−4.2=
Please help meeeeeeeeeeee
Answer:
Step-by-step explanation:
12.6/4.2 = 3
Answer:-3
Step-by-step explanation:
which of the three curves drawn matches the graph of y = 2x 2 + x?
Answer:
y= 0 1 2 3 4
Step-by-step explanation:
just minus 2 by all of the numbers from x
A worker uses a forklift to move boxes that weigh either 40 pounds or 65 pounds each. Let x be the
number of 40-pound boxes and y be the number of 65-pound boxes. The forklift can carry up to
either 45 boxes or a weight of 2,400 pounds. Which of the following systems of inequalities
represents this relationship?
Answer:
40x+65y≤2,400 and x+y≤45
Step-by-step explanation:
i will give Brainliest
can you please put the answers by the questions?
thx
(i you see 69 for points skskskskskks)
Answer:
idkkk im trying to figure it out as quick as i cannn
Step-by-step explanation: