5. A manager of a Merchandising firm wishes to test whether its three salesmen X, Y and Z tend to make sales of the

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5. A manager of a Merchandising firm wishes to test whether its three salesmen X, Y and Z tend to make sales of the same size or whether they differ in their selling abilities. During a week there have been 14 sale call; X made 5 calls, Y made 4 calls and Z made 5 calls. Following are the weekly sales record of three salesmen: + X 5 4 7 8 6 Y 3 7 4 6 - Z 5 3 5 4 3 Perform the analysis of variance and draw your conclusion.