Question Set 2: One-Way ANOVA + Tukey Post-Hoc Comparisons

An instructor is comparing the test scores of students who completed the same course using three different curricula. These data are saved in the Lesson10CurriculumData.xlsx PLEASE SEE ATTACHMENTS PAGES 1-4 AT THE BOTTOM OF THE PAGE

A. Use Minitab Express to compute the mean and standard deviation for the TestScore variable for each of the three curricula separately (Descriptive Statistics > Variable = TestScore and Group variable = Curriculum). Remember to include your Minitab Express output and to clearly identify your final answers. [10 points]

B. Use Minitab Express to construct side-by-side boxplots to compare the test scores of the three curriculum groups. For a review, see 3.3 in the online notes. [10 points]

C. Use Minitab Express to conduct a one-way ANOVA to compare the test scores of the three curriculum groups. Use the five-step hypothesis testing procedure given below. Remember to copy+paste all relevant Minitab Express output and to clearly identify your answers. [30 points]

Step 1: State hypotheses and check assumptions

Step 2: Compute the test statistic

Step 3: Determine the p-value

Step 4: Decide to reject or fail to reject the null hypothesis

Step 5: State a real-world conclusion

D. Use Minitab Express to conduct Tukey simultaneous tests for differences in means. Remember to include all relevant output. Clearly state which pairs are significantly different and which pairs are not significantly different. [15 points]

E. Summarizing the results of your one-way ANOVA and Tukey tests for a general audience. Imagine that you are explaining your results to someone with little or no knowledge of statistics. [15 points]

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