# Answers a researcher is interested in a longitudinal

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Answers: A researcher is interested in a longitudinal study that follows a group of kindergarten children through high school and assesses their body mass index at four time points. A researcher classifies a group of college students on the basis of their political leanings as liberal, conservative, libertarian, or green.
A researcher is interested in the effects of distraction on driving performance and randomly assigns participants to one of three distraction groups. A researcher is interested in whether a sensitivity training class changes attitudes toward minority populations. The researcher assesses these attitudes before, immediately after, and six months after the sensitivity training class. Question 16 0 out of 5 points A one-way within-groups ANOVA is also known as a _____ ANOVA. Selected Answer: single samples Answers: between-groups single samples repeated-measures multiple groups Question 17 0 out of 5 points If there are only two samples, then the F distribution is the: Selected Answer: null hypothesis distribution for N = 2average of the two samples. Answers: sum of the two samples. square of the t distribution. square of the z distribution. null hypothesis distribution for N = 2average of the two samples. Question 18 0 out of 5 points A one-way within-groups ANOVA is used when there is (are) _____ independent variable(s) with _____ than 2 levels. Selected Answer: 2; more Answers: 1; more 2; more 1; less 2; less Question 19 0 out of 5 points Changes in within-groups variance result in changes in the _____ of the F ratio. Selected Answer: numerator Answers: denominator numerator sign direction
Question 20 0 out of 5 points The one-way within-groups design can be viewed as an extension of which other research _____ design because of its ability to analyze data from more groups? Selected Answer: between-groups ANOVA Answers: independent-samples t test paired-samples t test Tukey HSD test between-groups ANOVA Question 1 0 out of 5 points According to Cohen's conventions, an R2 of 0.19 is considered to be a(n) _____ effect size. Selected Answer: small Answers: small medium large erroneous Question 2 0 out of 5 points To calculate the total sum of squares for a one-way within-groups ANOVA, each score's deviation from the _____ is squared and summed. Selected Answer: cell mean Answers: mean grand mean cell mean group mean Question 3 0 out of 5 points An F statistic calculated on 3 and 48 degrees of freedom equals 4.23. Which decision should be made about a hypothesis tested at the p = 0.05 level? Selected Answer: Fail to reject the null hypothesis and conclude no significant differences are indicated among the groups. Answers: Fail to reject the null hypothesis and conclude there are differences among the groups.
Fail to reject the null hypothesis and conclude no significant differences are indicated among the groups.
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