A researcher conducts an independent-measures study examining the effectiveness of a group exercise program at an assisted living facility for elderly adults. One group of residents is selected to participate in the program, and a second group serves as a control. After 6 weeks, the researcher records a combined score measuring balance and strength for each individual. The data are as follows:
Control Exercise n = 8 n = 8 M = 12 M = 15 SS = 60 SS = 66
a. Does the exercise program have a significant effect? Use an alpha level of .05, two tails.
b. Estimate the standard error =
(1) 1.5
(2) 1.2
c. The t statistic from the sample data = ?
d. The critical t =
(1) 2.145 or -2.145
(2) 2.365 or -2.365
e. The researcher (1) rejects or (2) fails to
