Question
In: Statistics and Probability
At the 5% significance level, test the claim that the variance in wait times for a...
At the 5% significance level, test the claim that the variance in wait times for a call center is 100 square minutes. A simple random sample of 9 call center calls found that the mean wait time was 97.7 minutes with a standard deviation of 11.3 minutes. Assume the population is normally distributed.
Solutions
Expert Solution
given
s = 11.3
s2 = ( 11.3)2 = 127.69
Conclusion
It is concluded that the null hypothesis Ho is not rejected. Therefore, there is enough evidence to claim that
the variance in wait times for a call center is 100 square minutes. at the 0.05 significance level.
orchestra answered 1 year agoRelated Solutions
A hypothesis test with a 5% level of significance is designed to test the claim that...
A hypothesis test with a 5% level of significance is designed to
test the claim that the mean weight of a new breed of chickens is
greater than 6.00 pounds. A sample of 81 chickens is obtained and
their mean weight is 6.20 pounds with a sample standard deviation
of 0.50 pounds. No information is available concerning the standard
deviation of the whole population of the new breed. What is the
critical value (from Table A-3) and the test statistic...
Conduct a hypothesis test with a 5% level of significance on the claim that the average...
Conduct a hypothesis test with a 5% level of
significance on the claim that the average annual salary for a
registered nurse in the state of Washington in 2017 was $55,000.
Plainly state your null and alternative hypothesis, what type of
test you are using, and why.
Data:
61000, 57700, 120100, 8500, 55200,
53000, 40700, 48800, 33800, 50100,
40900, 56300, 56100, 34600, 2100,
42600, 2400, 48600, 21300, 52600,
87900, 29700, 43300, 33200, 41500,
47600, 79100, 38300, 8500, 112000,
10100, 79100,...
You wish to test the following claim ( H a ) at a significance level of...
You wish to test the following claim ( H a ) at a significance
level of α = 0.002 . H o : μ = 73.8 H a : μ > 73.8 You believe
the population is normally distributed, but you do not know the
standard deviation. You obtain a sample of size n = 31 with mean M
= 83.5 and a standard deviation of S D = 16.9 . What is the test
statistic for this sample? (Report...
You wish to test the following claim ( H a ) at a significance level of...
You wish to test the following claim ( H a ) at a significance
level of α = 0.01 . H o : μ 1 = μ 2 H a : μ 1 < μ 2 You believe
both populations are normally distributed, but you do not know the
standard deviations for either. However, you also have no reason to
believe the variances of the two populations are not equal. You
obtain a sample of size n 1 = 24...
You wish to test the following claim ( H a ) at a significance level of...
You wish to test the following claim ( H a ) at a significance
level of α = 0.02 .
H o : p 1 = p 2
H a : p 1 < p 2
You obtain 159 successes in a sample of size n 1 = 646 from the
first population. You obtain 66 successes in a sample of size n 2 =
221 from the second population.
What is the test statistic for this sample? (Report answer...
You wish to test the following claim ( H a ) at a significance level of...
You wish to test the following claim ( H a ) at a significance
level of α = 0.002 . H o : μ 1 = μ 2 H a : μ 1 ≠ μ 2 You believe
both populations are normally distributed, but you do not know the
standard deviations for either. However, you also have no reason to
believe the variances of the two populations are not equal. You
obtain the following two samples of data. Sample #1...
You wish to test the following claim ( H a ) at a significance level of...
You wish to test the following claim ( H a ) at a significance
level of α = 0.005 .
H o : μ = 50.7
H a : μ ≠ 50.7
You believe the population is normally distributed, but you do
not know the standard deviation. You obtain a sample of size n = 5
with mean M = 26.7 and a standard deviation of S D = 14.5 .
What is the p-value for this sample? (Report answer...
You wish to test the following claim ( H a ) at a significance level of...
You wish to test the following claim ( H a ) at a significance
level of α = 0.02 . H o : p 1 = p 2 H a : p 1 < p 2 You obtain
205 successes in a sample of size n 1 = 228 from the first
population. You obtain 324 successes in a sample of size n 2 = 320
from the second population. For this test, you should NOT use the
continuity correction,...
You wish to test the following claim ( H a ) at a significance level of...
You wish to test the following claim ( H a ) at a significance
level of α = 0.005 . For the context of this problem, μ d = P o s t
T e s t − P r e T e s t one data set represents a pre-test and the
other data set represents a post-test. Each row represents the pre
and post test scores for an individual.
H o : μ d = 0 H a...
You wish to test the following claim ( H a ) at a significance level of...
You wish to test the following claim ( H a ) at a significance
level of α = 0.005 . H o : p 1 = p 2 H a : p 1 > p 2 You obtain
a sample from the first population with 210 successes and 90
failures. You obtain a sample from the second population with 152
successes and 124 failures. What is the critical value for this
test? (Report answer accurate to three decimal places.) critical...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Allocation: Fixed and Variable Costs, Budgeted Fixed and Variable Costs Biotechtron, Inc., has two research laboratories...
- Do you think that there is still institutionalized racial discrimination in the United States today and...
- Computer Security Consider a desktop publishing system used to produce documents for various organizations. a. Give...
- Review the discussion question and answer below. Do you agree with the answer? why or why...
- For the assignment you have to do two thing Passing arguments when running the jar or...
- Explain how biology, culture, and their interaction shape sex differences.
- Write a program that computes the tax and tip on a restaurant bill for a patron...
ADVERTISEMENT