$10.00 rES 342 QUESTION 2
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?
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