A developmental psychologist is examining the development of language skills from age 2 to age 4. Three different groups of children are obtained, one for each age, with n = 16 children in each group. Each child is given a languageskills assessment test. The resulting data were analyzed with an ANOVA to test for mean differences between age groups. The results of the ANOVA are presented in the following table.
Source SS df MS
Between treatments 20 ____ ____ F = ____
Within treatments ____ ____ ____
Total 200 ____
Calculate the missing value for SS_{w/i :}
_{Calculate the missing value for dfb/t }
_{Calculate the missing value for dftotal }
_{Calculate the missing value for dfw/}
_{Calculate the missing value forMSb/t}
_{Calculate the missing Fratio}
A developmental psychologist is examining the development of language skills from age 2 to age 4. Three different groups of children are obtained, one for each age, with n = 18 children in each group. Each child is given a languageskills assessment test. The resulting data were analyzed with an ANOVA to test for mean differences between age groups. The results of the ANOVA are presented in the following table. Fill in all missing values. (Hint: Start with the df column.) Remember to show your work for all computations!
SS 
df 
MS 
F 

Between treatments 
48 


Within treatments 

Total 
252 
A developmental psychologist is examining the development of language skills
from age 2 to age 4. Three different groups of children are obtained, one for
each age, with n = 15 children in each group. Each child is given a languageskills
assessment test. The data from this experiment were analyzed with an ANOVA,
and the results are summarized in the following table. Fill in all of the missing
values. (Hint: start with the df column using the formula sheet partIV.)
Source SS df MS or s2 ____________________________________________________________________________
Between treatments 30 _______ ________ _______
Within treatments _____ _______ ________
Total 225 _______
A developmental psychologist is examining the development of language skills from age 2 to 4. Three different groups of children are obtained, one for each age, with n = 16 children in each group. Each child is given a languageskills assessment test. The resulting data were analyzed with an ANOVA to test for mean differences between groups. The results of the ANOVA are presented in the following table. Fill in all missing values. (A step by step process is not needed for this problem).
Source SS df MS
Between treatments 20 ________ _______ F =_______
Within treatments _______ ________ _______
Total 200 ________
What is are the degrees of freedom for this experiment?
4 

3 

1 

2 
A developmental psychologist is examining the development of language skills from age 2 to age 4. Three different groups of children are obtained, one for each age, with n = 18 children in each group. This data can be analyzed using a One Way ANOVA. Each child is given a languageskills assessment test. Answer the following questions:
1) Identify the independent and dependent variable for the study.
2) Discuss why you should not use a Two Sample TTest to answer this complex research problem.
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