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# \$10.00rES 342 QUESTION 2

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Chi-square problems,  can be done by hand, or write out the equations in Excel

15.3 Students applying for admission to an MBA program must submit scores from the GMAT test, which includes a verbal and a quantitative component. Shown here are raw scores for 100 randomly chosen MBA applicants at a Midwestern, public, AACSB-accredited business school.
Research question: At α = .005, is the quantitative score independent of the verbal score?
GMAT
Quantitative
Verbal             Under 25              25 to 35                 35 or More          Row Total
Under 25              25                        9                            1                        35
25 to 35               4                         28                          18                        50
35 or More            1                         3                            11                        15
Col Total             30                       40                            30                        100

15.7 One-year sales volume of four similar 20-oz. beverages on a college campus is shown. (a) Make a bar chart and describe it. (b) Calculate expected frequencies for each class. (c) Perform the chisquare test for a uniform distribution. At α = .05, does this sample contradict the assumption that sales are the same for each beverage? Frapp

Beverage                  Sales (Cases)
Frappuccino Coffee           18
Frappuccino Mocha            23
Frappuccino Vanilla            23
Frappuccino Caramel          20
Total                                84