QUESTION 33

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. The numerator degrees of freedom for the ANOVA is _______.

1

2

3

4

1 points