Problem #30

I would like to request some help with this problem. Thanks.

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:

Does the type of exercise treatments

influence weight loss significantly? Use= 5%.

Treatment

Mean Std. Dev. n

Long periods 11.2 2.2 9

Multiple short periods 8.3 3.2 9

Multiple short periods with treadmill 11.3 2.6 9

Which one will be the alternative hypothesis (H)?

• At least one of the proportions is different from the others
• The distribution of the categorical variable is not as given by the null hypothesis (lack of fit)
• At least one of the means is different from the others
• At least one of the standard deviations is different from the others
• The three categorical variables are dependent
• The distribution of the categorical variable is not the same across populations or treatments