For each problem:

• Make a complete hypothesis
• Highlight the value, decision, and conclusion
• Write the conclusion in context of the problem
• Show all work in Excel
• Use a separate Excel sheet for each problem

1. Professor O claims that he grades on a curve - that is, 10% of students receive A's, 20% B's, 40% C's, 20% D's, and 10% F's. A student who doubts this collects a sample of 63 grades from O's classes and finds 8 A's, 7 B's, 28 C's, 11 D's and 9 F's. Does this indicate that Professor O's grades are not distributed as he claims?

2. Associated Investors has been accused of engaging in prejudicial hiring practices. According to the most recent census, the percentage of whites, blacks, and Hispanics in the community where Associated is located are 70%, 12%, and 18% respectively. If a random sample of 200 of Associates' employees revealed that 160 were white, 13 were black, and 27 were Hispanic, what at the 0.05 level, can be concluded about the distribution of Associated's employees?

3. Is payment method independent of [or is it related to] the cost of a meal? Test at the 0.05 level of significance. See chart below.