A Random Sample of Size 15 Taken from a Normally

question 22

Multiple Choice

A random sample of size 15 taken from a normally distributed population revealed a sample mean of 75 and a sample variance of 25.The upper limit of a 95% confidence interval for the population mean would equal:

• A) 77.769.
• B) 72.231.
• C) 72.727.
• D) 77.273.

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