Question

Construct an 80​% confidence interval to estimate the population mean when x overbarequals139 and s​ = 29 for the sample sizes below.

​a) n=30       ​b) n=60       ​c) n=100

​a) The 80​% confidence interval for the population mean when n=30 is from a lower limit --- of nothing to an upper limit of---- nothing. ​(Round to two decimal places as​ needed.)

​b) The 80​% confidence interval for the population mean when n=60 is from a lower limit--- of nothing to an upper limit----- of nothing. ​(Round to two decimal places as​ needed.)

​c) The 80​% confidence interval for the population mean when n=s100 is from a lower limit of------ nothing to an upper limit of----- nothing. ​(Round to two decimal places as​ needed.)

Answer 1