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 language-skills 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 F-ratio}

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 language-skills 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!

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 language-skills
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 language-skills 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                      ________

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 language-skills 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 T-Test to answer this complex research problem.