SOLUTION: Assume that in a hypothesis test with null hypothesis 0 μ H : = 13.0 at a = 0.05, that a value of 11.0 for the sample mean results in the null hypothesis not being rejected.

Question 390557: Assume that in a hypothesis test with null hypothesis 0 μ H : = 13.0 at a = 0.05, that a
value of 11.0 for the sample mean results in the null hypothesis not being rejected. That
corresponds to a confidence interval result of
A) The 95% confidence interval for the mean does not contain the value 13.0
B) The 95% confidence interval for the mean contains the value 11.0
C) There is insufficient information to conclude whether the 95% confidence interval
for the mean contains or does not contain the value 13.0
D) The 95% confidence interval for the mean contains the value 13.0
Nationwide, the average waiting time until electric utility customer service
representative answers a call is 300 seconds per call. The Gigantic Kilowatt Energy
Company took a sample of 35 calls and found that, on the average, they answered in 240
seconds per call with a standard deviation of 50. Can the company claim that they are
faster than the average utility?
A) No, because �0.20 falls in the critical region
B) Yes, because �7.10 falls in the critical region
C) No, because �1.20 falls in the critical region
D) Yes, because �0.20 falls in the critical region
If the observed value is 4, the expected value is 5, and the standard error is 4, then the
test value used for the z test is equal to
A) �1.00 B) 0.25 C) �0.25 D) 1.00
What is the critical t-value for a right-tailed test when a = .025and d.f. = 12?
A) 0.695 B) 2.179 C) 2.831 D) 2.201

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Assume that in a hypothesis test with null hypothesis Ho: u = 13.0 at a = 0.05, that a value of 11.0 for the sample mean results in the null hypothesis not being rejected. That corresponds to a confidence interval result of
A) The 95% confidence interval for the mean does not contain the value 13.0
B) The 95% confidence interval for the mean contains the value 11.0
C) There is insufficient information to conclude whether the 95% confidence interval for the mean contains or does not contain the value 13.0
D) The 95% confidence interval for the mean contains the value 13.0
---
Answer: A
===================
Nationwide, the average waiting time until electric utility customer service
representative answers a call is 300 seconds per call.
The Gigantic Kilowatt Energy Company took a sample of 35 calls and found that, on the average, they answered in 240 seconds per call with a standard deviation of 50. Can the company claim that they are faster than the average utility?
Ho: u = 300
Ha: u < 300 (claim)
t(240) = (240-300)/[50/sqrt(35)] = -7.10
A) No, because �0.20 falls in the critical region
B) Yes, because �7.10 falls in the critical region
C) No, because �1.20 falls in the critical region
D) Yes, because �0.20 falls in the critical region
Answer: B
==========================================
If the observed value is 4, the expected value is 5, and the standard error is 4, then the test value used for the z test is equal to:
z(4) = (4-5)/4 = -1/4
---
A) �1.00 B) 0.25 C) �0.25 D) 1.00
Ans: C
==========================================
What is the critical t-value for a right-tailed test when a = .025and d.f. = 12?
A) 0.695 B) 2.179 C) 2.831 D) 2.201
Ans: B
=================
Cheers,
Stan H.

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SOLUTION: Assume that in a hypothesis test with null hypothesis 0 &#956; H : = 13.0 at a = 0.05, that a value of 11.0 for the sample mean results in the null hypothesis not being rejected.

SOLUTION: Assume that in a hypothesis test with null hypothesis 0 μ H : = 13.0 at a = 0.05, that a value of 11.0 for the sample mean results in the null hypothesis not being rejected.