Chapter 16.5, Problem 10SE

The results shown below are mean productivity measurements (average number of assemblies completed per hour) for a random sample of workers at each of three work stations. (a) At α = .05, is there a difference in median productivity? Use MegaStat, Minitab, or a similar computer package for the calculations. (b) Use one-factor ANOVA to compare the means. Do you reach the same conclusion? (c) Make a histogram or other display of the pooled data. Does the assumption of normality seem justified?