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:
$$\begin{array} { c c }
\text { Control } & \text { Exercise } \
\hline n = 10 & n = 15 \
M = 12 & M = 15.5 \
S S = 120.5 & S S = 190.0
\end{array}$$
a.Does the exercise program have a significant effect? Use an alpha level of .05, two
tails.
b.Compute Cohen's d to measure the size of the treatment effect.

Question

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:
 $$\begin{array} { c c } 
\text { Control } & \text { Exercise } \
\hline n = 10 & n = 15 \
M = 12 & M = 15.5 \
S S = 120.5 & S S = 190.0
\end{array}$$ 
a.Does the exercise program have a significant effect? Use an alpha level of .05, two
tails.
b.Compute Cohen's d to measure the size of the treatment effect.

Quizplus · Accepted Answer

The Answer of 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:
 $$\begin{array} { c c } 
\text { Control } & \text { Exercise } \
\hline n = 10 & n = 15 \
M = 12 & M = 15.5 \
S S = 120.5 & S S = 190.0
\end{array}$$ 
a.Does the exercise program have a significant effect? Use an alpha level of .05, two
tails.
b.Compute Cohen's d to measure the size of the treatment effect.

A Researcher Conducts an Independent-Measures Study Examining the Effectiveness of a Group