The Rocky Mountain district sales manager of Rath Publishing Inc., a college tex

Question

The Rocky Mountain district sales manager of Rath Publishing Inc., a college textbook publishing company, claims that the sales representatives make an average of 41 sales calls per week on professors. Several reps say that this estimate is too low. To investigate, a random sample of 25 sales representatives reveals that the mean number of calls made last week was 43. The standard deviation of the sample is 2.8 calls. Using the 0.010 significance level, can we conclude that the mean number of calls per salesperson per week is more than 41?

H0 : 41 H1 : > 41

1. Compute the value of the test statistic. (Round your answer to 3 decimal places.)

Value of the test statistic _______

Explanation / Answer

THE TEST STATIC = (X-MEAN)/(STANDARD DEVIATION/SQRT(N))

THEREFORE ACCORDING TO THE FORMULA

TEST STATIC = (43-41)/(2.8/SQRT(25))

= 3.571

HENCE THE TEST STATIC = 3.571

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