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Question 12 A random sample of size 70 is taken from a population that has a variance of 49. The sample mean is 90.4. What is the point estimate of ?...

Question 12

A random sample of size 70 is taken from a population that has a variance of 49. The sample mean is 90.4. What is the point estimate of μ? Construct a 94% confidence interval for μ.

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Solution:
Sample size (n) = 70
Population variance () = 49
Sample mean () = 90.4
The point estimate of the population mean μ= = 90.4
The 100(1­α) % confidence interval for μ is () where is the...

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