Exercise 4.10 To determine if dancing enhances mood, you recruit 100 voluntary participants. You randomly select 50 and give them seven free dance lessons; the other 50 get no dance lessons. After the seventh class, you administer the Acme Happiness Scale Survey (AHSS) to all 100 individuals; this survey renders a score ranging from 1 to 30 (1 = extremely unhappy, 30 = extremely happy).

Data set: Ch 04 - Exercise 10.sav Codebook Variable: dance Definition: Dance class membership status Type: Categorical (1 = Dancer, 2 = Nondancer)

Variable: ahss Definition: Score on Acme Happiness Scale Survey Type: Continuous