Question: What hypothesis test(s) would you apply to the following four situations and specify your reasons why (measurement scale/data type, sample number/type/size, etc.)
A. The Republican party suspects there are geographical differences regarding five issues. The importance of each issue is based on ratings (1=low to 5=high) gotten from telephone interviews of 100 people each in Atlanta, Dallas, Indianapolis and New York City.
B. The Democratic Party believes the Atlanta Mayor's performance has declined. A random sample of 200 Atlanta residents were surveyed and asked to respond with "Yes", "No" or "No opinion" on four issues for which survey results had been reported one year ago.
C. To understand differences in viewer preferences for pilot TV programs, NBC surveys 300 viewers each in Atlanta and Miami and gets rankings (1, 2 or 3) of their preferences.
D. ABC, Inc. hires new salespeople based on the scores on an entrance test. The salespeople attend a two-week training session to improve their knowledge base, and are tested again. ABC's President wants to know if the salespeople's level of knowledge has increased.
Measurement ---------- Sample description -----------
Case Scale/Data type Number Independent/Related Size Hypothesis test(s)
A
B
C
D