A) Construct the indicated confidence interval for the population mean mu using the t-distribution c=0.95, x-overbar=12.7, s=2.

A) Construct the indicated confidence interval for the population mean mu using the t-distribution

c=0.95,  x-overbar=12.7,  s=2.0, n=9

The 95% confidence interval using a t-distribution is (  ,  )

B) A population has a mean mu=84 and a standard deviation sigma=28. Find the mean and standard deviation of a sampling distribution of sample means with sample size n=49.

mu-x= 

Sigma-x=