Exercise 6.8 It is thought that exercising early in the morning will provide better energy throughout the day. To test this idea, subjects are recruited and randomly assigned to one of three groups: Members of Group 1 will constitute the control group and not be assigned any walking.

Members of Group 2 will walk from 7:00 to 7:30 a.m., Monday through Friday, over the course of 30 days. Members of Group 3 will walk from 7:00 to 8:00 a.m., Monday through Friday, over the course of 30 days. At the conclusion of the study, each participant will answer the 10 questions on the Acme End-of-the-Day Energy Scale. This instrument produces a score between 1 and 100 (1 = extremely low energy, 100 = extremely high energy).

Data set: Ch 06 - Exercise 08A.sav Codebook Variable: group Definition: Walking group assignment Type: Categorical (1 = No walking, 2 = Walking: 30 Minutes, 3 = Walking: 60 minutes)

Variable: mood Definition: Energy level Type: Continuous (1 = extremely low energy, 100 = extremely high energy)

1. Write the hypotheses