14. A researcher reports outcomes of one-factor ANOVA as F(5,60) = 3.24, p > .05. Based on the df values, how many groupswere compared in the study, and what was the total number ofsubjects participating in the study?

• A. 6 groups & total of 66 participants.

• B. 4 groups & total of 64 participants.

• C. 5 groups & total of 55 participants.

• D. 4 groups & total of 60 participants.

16. A one-way ANOVA is used to evaluate the mean differences inBMI (i.e., body mass index) between three groups of adults - youngadults, middle age adults and elderly. Each age group had n = 10participants. If the data produced an F-ratio of F = 3.38, which ofthe following is the correct conclusion from this study (assume p<. 05)?

• A. Reject the null hypothesis and conclude that there are nosignificant differences in mean BMI.

• B. Fail to reject the null hypothesis and conclude that thereare significant differences in mean BMI.

• C. Reject the null hypothesis and conclude that there weresignificant differences in mean BMI.

• D. Fail to reject the null hypothesis and conclude that thereare no significant differences in mean BMI.

17.A one-way ANOVA is used to evaluate the mean differencesbetween five experimental
groups, with n = 12 participants in each group. If the data producean F= 4.74, which of the following is the correct statisticaldecision?

• A. Reject the null hypothesis with α = .05 but fail to rejectwith α = .01.

• B. Reject the null hypothesis with either α = .05 or α =.01.

• C. Fail to reject the null hypothesis with either α = .05 or α =.01.

• D. Reject the null hypothesis with α = .01 but fail to rejectwith α = .05.

19.

A researcher wanted to examine if the type of music one listensto while studying affects memory performance. She randomly selectedfive samples of participants and assigned each of them to one offive experimental conditions - listening to classical music, jazz,R&R, R&B or Hip hop. Each sample had 14 subjects (n = 14).All participants were asked to memorize a list of words whilelistening to one of the five types of music tested. At the end, allparticipants took a memory test. One-factor ANOVA for independentsamples was conducted to test if there is a significant effect ofmusic type on memory performance. The results of the analysis areshown in the following ANOVA summary table.

                          

                                           Source      SS        df       MS             

                          Between Treatments     48     ____     ____    F =3.00  

                          Within Treatments      ____    ____    ____    

                          Total                       ____     ____

         A. Fill in all missing values in the ANOVA summary table.Show your work (i.e., all computational steps for finding themissing values). Hint: start with the dfvalues and figure out the rest by solving simple equations with oneunknown (i.e., refer to the computational formulas for df,MS & F statistic).

       

          B. Do the data indicate a significant effect of type musicon memory performance (assume p < .05)? Use theoutcomes of one-factor ANOVA summarized in the table to test thisresearch question.

• the null hypothesis H₀ & the alternativehypothesis H₁ ?
• the critical F used for the decision aboutH₀ ?
• the decision about H₀?
• if the difference is statistically significant, the effectsize, η²?