6 Data collected by the human resources group at a company p

6. Data collected by the human resources group at a company produced this confidence interval for the average age of MBAs hired during the past recruiting seminar. With 95% confidence, 26.202

Solution

a). We are 95% confident that the population mean will fall in the interval ( 26.202, 28.844). b). margin of error = (28.844-26.202)/2 =1.321 c). width of the interval =28.844-26.202 = 2.642 d). center of the interval = (28.844+26.202)/2 =27.523 e). 90% CI will be narrower.