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A random sample of 36 staff members at a local hospital showed an average age of...

A random sample of 36 staff members at a local hospital showed an average age of 25 years. Ages of the staff at the hospital are normally distributed with a population standard deviation of 1.8 years. The 98% confidence interval for the average age of all hospital staff is

a)

 24.385 to 25.615

b)

 23.200 to 26.800

c)

 24.301 to 25.699

d)

 23.236 to 26.764
Math   Statistics-And-Probability   
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Answer #1

Let denotes the average age of all hospital staff.

ans-> c) 24.301 to 25.699

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