A senior accounting major at Midsouth State University has job offers from four CPA firms. To explore the offers further, she asked a sample of recent trainees how many months each worked for the firm before receiving a raise in salary. The sample information is submitted to Minitab with the following results:

At the .05 level of significance, is there a difference in the mean number of months before a raise was granted among the four CPAfirms?

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Analysis of Variance Source DF MS 3 32.33 10.78 2.36 0.133 10 13 4.57 Error Total 45.67 78. 00