The comparison boxplots shown to the right show the revenue generated by individ

Question

The comparison boxplots shown to the right show the revenue generated by individual sales representatives who operate in divisions supervised by two different managers. What is the problem with using a two-sample t-test to judge the statistical significance of the apparent differences? 50- 40- Number 24 37 Mean 27.8125 33.4973 Std Dev 7.02315 5.46954 Manager 20- 0 A B Manager 8 Choose the correct answer below A. The number of elements in each group of data is not the same. O B. The variances from each group are not approximately equal to each other ° C. The value of n is less than 30 in the group for Manager A. 0 D. If these data are not from a randomized experiment, there could be many sources of confounding.

Explanation / Answer

Answer is B.The variances from each group are not approximately equal to each other.

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