SCENARIO 10-15
the Table Below Presents the Summary Statistics for the Starting

SCENARIO 10-15
The table below presents the summary statistics for the starting annual salaries (in thousands of
dollars) for individuals entering the public accounting and financial planning professions. Sample I (public accounting) : $\bar { X } _ { 1 } = 60.35 , S _ { 1 } = 3.25 , n _ { 1 } = 12$
Sample II (financial planning) : $\bar { X } _ { 2 } = 58.20 , S _ { 2 } = 2.48 , n _ { 2 } = 14$ Test whether the mean starting annual salaries for individuals entering the public accounting
professions is higher than that of financial planning assuming that the two population variances are
the same.
-Referring to Scenario 10-15, what assumption(s) is(are) necessary for testing whether there is evidence of a difference in the variances to be valid?

A) Both sampled populations are normally distributed.
B) Both samples are random and independent.
C) Neither (a) nor (b) is necessary.
D) Both (a) and (b) are necessary.