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 season.
With 95.00% confidence, 26.202 6 μ 6 28.844
(a) Explain carefully what the software output means.
(b) What is the margin of error for this interval?
(c) Round the endpoints of the interval for a scale appropriate for a summary report to management.
(d) If the researcher had calculated a 90% confidence interval, would the interval be longer or shorter?