Write out the null and alternative hypothesis for the one-way between-subjects ANOVA examining if developmental age group has an effect on the number of driving errors committed when a same-age peer...

Write out the null and alternative hypothesis for the one-way between-subjects ANOVA examining if developmental age group has an effect on the number of driving errors committed when a same-age peer is watching.

Null Hypothesis:

Alternative Hypothesis:

QUESTION 2

3 points

Examine the variability measures and the Levene’s Test for Equality of Variances. Based on these test results, does our data have problems meeting the equality of variance assumption? Should we consider using an alternative test such as the Welch or Brown-Forsythe to interpret the results of the test?

QUESTION 3

3 points

What were the results of the one-way ANOVA? Indicate whether the test was statistically significant or not, state whether you would reject or fail to reject the null hypothesis, and report the
F-ratio results in statistical notation.

QUESTION 4

3 points

Use your one-way between-subjects ANOVA output to calculate the effect size eta-squared (
). Report and interpret this effect size below.

QUESTION 5

3 points

Interpret the results of the Tukey HSD post hoc test. In your response, indicate which developmental groups are significantly different from each and explain how they are different from one another.

QUESTION 6

8 points

Write a brief one-paragraph report in APA Style summarizing the results of the study in Part 1 of your assignment. Report the ANOVA results in correct statistical notation, include a measure of effect size, and interpret the post hoc test results. Finally, provide at least one sentence interpreting the findings (i.e. Do the results show that adolescents engage in more risky driving behaviors when a peer is present than young adults or adults?)

QUESTION 7

5 points

Paste the bar chart figure you created showing the mean differences in number of crashes between adolescent, young adult, and adult groups below and include an APA style title.

QUESTION 8

3 points

Examine the output for Mauchly’s Test of Sphericity. Does the test indicate problems meeting the assumption of sphericity? Report the results of the test and based on this outcome explain which test you will use to interpret the results?

QUESTION 9

3 points

What were the results of the repeated measures ANOVA? Indicate whether the test was statistically significant or not, state whether you would reject or fail to reject the null hypothesis, and report the
F-ratio results in statistical notation.

QUESTION 10

3 points

Review and interpret the results of the post hoc pairwise comparisons and compare the mean weight across the three time conditions. In particular, do the findings suggest that the weight loss program was initially effective at helping participants lose weight? Was the program effective at helping them maintain weight loss after the program was over?

QUESTION 11

8 points

Taking into consideration your responses to the questions #9-10 above, write a brief executive summary reporting the findings to the company in charge of the weight loss program. Instead of reporting technical statistical results, focus on providing a direct easy to interpret summary of the findings. Include an easy to interpret table showing the mean differences in weight before the weight loss program, directly after the weight loss program, and at the six-month follow-up. Finally, provide your expert recommendation to the company about the overall effectiveness of their weight loss program.