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THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

Question 123

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
Suppose that the waiting times for patients at a local hospital are normally distributed with known population standard deviation of 30 minutes.A random sample of 75 patients in the local hospital had a mean time of 90 minutes.Assume a 95% confidence interval for the population mean μ.
-Calculate the standard error of the 95% confidence interval.


A) 0.40
B) 3.46
C) 13.69
D) 2.50

Correct Answer:

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