Question:

Four groups of salesmen for a magazine sales agency were subjected to different sales training programs. At the end of the training programs, each salesman was randomly assigned a sales area from a group of sales areas which were judged to have equivalent sales potentials. The number of sales made by each salesman during the first week after completing the training program is listed below. Do the data present sufficient evidence to indicate a difference in the mean achievement for the four training programs? (Use \(\alpha \) = 0.05).

Sales Training Programs

1 2 3 4

65 75 59 94

87 69 78 89

73 83 67 80

79 81 62 88

81 72 83 85

69 79 76 87

75 90 70 90