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

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