Abbott & Sons needs to forecast the mean age, µ, of its hourly workforce. A random sample of personnel files is pulled with the results below. Prepare both a point estimate and a 98% confidence interval for the mean age of the entire workforce. Test the hypothesis H0: µ = 44 versus H1: µ ≠ 44 at the 2% level. Are the results of the hypothesis test consistent with the confidence interval for µ? Would you expect them to be?
= 45.2 S = 10.3 n = 175 |

New search. (Also 1294 free access solutions) |