QUESTION 35

1. A study randomly assigned adult subjects to one of three exercise treatments: (1) a single long exercise period five days per week; (2) several ten-minute exercise periods five days per week; and (3) several ten-minute periods five days per week using a home treadmill. The study report contains the following summary statistics about weight loss (in kilograms) after six months of treatment:

Treatment

Mean

Std. Dev.

n

Long periods

10.2

4.2

37

Multiple short periods

9.3

4.5

36

Multiple short periods with treadmill

10.2

5.2

42

2. Here is a partial ANOVA table based on these data:

Source

df

Sums of Squares

Mean Square

F-Ratio

Group

20.032

Error

21.8967

Total

2. What is the alternative hypothesis for the ANOVA?

The population mean weight loss after six months is greatest with multiple short periods of exercise using a treadmill.

The population mean weight loss after six months is different for each of the three exercise conditions.

The population mean weight loss after six months is not the same for the three exercise conditions.

The population mean weight loss after six months is the same for all three exercise conditions.

1 points