# A researcher conducts an indep

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 = 10             n = 15

M = 12          M = 15.5

SS = 120.5      SS = 190.0

​Does the exercise program have a significant effect? Use an alpha level of .05, two tails.

​Compute Cohen’s d to measure the size of the treatment effect.

# A researcher conducts an indep

A researcher conducts an independent-measures, two-factor study using a separate sample of n= 15 participants in each treatment condition. The results are evaluated using an ANOVA and the researcher reports an F-ratio with df = 1, 84 for factor A and an F-ratio with df = 2, 84 for factor B.

a) How many levels of factor A were used in the study?
b) How many levels of factor B were used in the study?
c) What are the df values for the F-ratio evaluating the interaction?

# A researcher conducts an indep

A researcher conducts an independent-measures, two- factor study using a separate sample of n = 5 participants in each treatment condition. The results are evaluated using an ANOVA and the researcher reports an F-ratio with df = 1, 24 for factor A, and an F-ratio with df = 2, 24 for factor B.

A)

How many levels of factor A were used in the study?

B)

How many levels of factor B were used in the study?

C)

What are the df values for the F-ratio evaluating the interaction?

# A researcher conducts an indep

A researcher conducts an independent-measures, two factor study with two levels of factor A and three levels of factor B, using a separate sample of n = 10 participants in each treatment condition

a. What is the dfwithin?

b. What is the df value for the F-ratio evaluating the main effect of Factor A?

c. What is are the df value for the F-ratio evaluating the main effect of factor B?

d. What is the df value for the F-ratio evaluating the interaction between A and B?

# A researcher conducts an indep

20)
A researcher conducts an independent-measures, two-factor study using a separate sample of n= 15 participants in each treatment condition. The results are evaluated using an ANOVA and
the researcher reports an F-ratio with df = 1, 84 for factor A and an F-ratio with df = 2, 84 forfactor B.

a) How many levels of factor A were used in the study?
b) How many levels of factor B were used in the study?
c) What are the df values for the F-ratio evaluating the interaction?

# A researcher conducts an indep

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 = 10                 n = 15

M = 12               M = 15.5

SS = 120.5          SS = 190.0

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.

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