Allied Corporation wants to increase the productivity of its line workers. Four different programs have been suggested to help increase productivity. Twenty employees, making up a sample, have been randomly assigned to one of the four programs and their output for a day's work has been recorded. You are given the results below.

(a). State the null and alternative hypotheses.
(b). Construct an ANOVA table.
(c). As the statistical consultant to Allied, what would you advise them? Use a .05 level of significance.
(d). Use Fisher's LSD procedure and determine which population mean (if any) is different from the others. Let ( = .05.
Using results generate from Minitab:

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ProgramA ProgramB Program C Program D 150 130 120 180 145 150 120 135 160 110 185 220 190 180 175 175 150 120 130 175