There are many programs that seek to change behavior. Social Psychologists condu
ID: 2907268 • Letter: T
Question
There are many programs that seek to change behavior. Social Psychologists conducted a study to increase sharing behavior in children during play when they were given their favorite toys. One way to assess the effect of a program is to give a pretest, administer the program, and give a posttest. To really prove the lasting value of the program, however, a researcher must gather follow-up data some months later to see if the improvement seen at posttest has continued. In the scores below, larger numbers represent more sharing behavior during play. Please conduct an anova and state whether the program was effective in increasing sharing behavior.
Subject 1 09 23 18 50
Subject 2 13 27 24 64
Subject 3 17 36 26 79
Subject 4 18 31 20 69
sums 57 117 88 ??tot = 262 ??2tot = 6354
means 14.25 29.25 22.00
A. Write your null and alternate hypothesis using stat symbols
B. What is the Independent and Dependent variables?
C. How many levels of the IV do you have in this study?
D. Conduct all the necessary calculations/ analyze the data, compile it into a summary table: you must upload all of the work behind the figures that you placed in the table (8 points)
E. Make an HSD comparisons between pre-test and one year follow?
F. Calculate the effect size for both comparisons in E.
D. Write an interpretation that describes the effects of the program.Write your conclusion/interpretation as seen in your video/lecture/text examples beginning with the reject or fail to reject the null hypothesis. Don't forget to include the effect size and all your stat symbols for full credit consideration (5 points)
SOURCE
SS
df
MS
F
p
pre/post/followup
Error
subjects
TOTAL
SOURCE
SS
df
MS
F
p
pre/post/followup
Error
subjects
TOTAL
Explanation / Answer
A. Write your null and alternate hypothesis using stat symbols
Ans: Vase 1.
Null Hypothesis: The mean scores between the pre, post, and 1yr follow have the insignificant difference.
Alternative Hypothesis: At least one mean scores between the pre, post, and 1yr follow have a significant difference.
Case 2
Null Hypothesis: The mean scores between the levels of the subject have the insignificant difference.
Alternative Hypothesis: At least one mean scores between levels of subject have a significant difference.
B. What is the Independent and Dependent variables?
Ans: The Independents are subject and variable of pre, post, and 1yr follow.
The dependent variable is the score.
C. How many levels of the IV do you have in this study?
Ans: Subject has 4 levels and variable of pre, post, and 1yr follow has 3.
D. Conduct all the necessary calculations/ analyze the data, compile it into a summary table: you must upload all of the work behind the figures that you placed in the table (8 points)
Ans:
Two-way ANOVA: Score versus Pre/post/1st, Subject
S = 2.511 R-Sq = 94.03% R-Sq(adj) = 89.05%
F. Calculate the effect size for both comparisons in E.
Ans:
D. Write an interpretation that describes the effects of the program.Write your conclusion/interpretation as seen in your video/lecture/text examples beginning with the reject or fail to reject the null hypothesis. Don't forget to include the effect size and all your stat symbols for full credit consideration (5 points)
Ans: Both the Pre/post/1st and Subject variables are significant at the score at 005 level of significance. Hence, at least one levels for each variable have significant mean score at 0.05 level of significance.
Source DF SS MS F P Pre/post/1st 2 450.167 225.083 35.7 0.0000 Subject 3 145.667 48.556 7.7 0.0180 Error 6 37.833 6.306 Total 11 633.667Related Questions
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