Sally is three years older than Jim. Jim is 18 years old. which solution should you arrive at to find sally's age?
(A). 18
(B). 21
(C). 24
(D). 27

Arandom sample of 45 observations results in a sample mean of 68. the population standard deviation is known to be 23 a. compute the margin of error at a 959% confidence interval. b. compute the 95% confidence interval for the population mean c. compute the 90% confidence interval for the population mean. d. compute the 75% confidence interval for the population mean