For each of the following questions, provide the answers in your own words. (Responses that simply copy what
is said in the notes or the text will not be accepted.)
1) What value of F is expected if the null hypothesis is true? Explain why in 3-4 sentences. (15)
2) Why are post hoc tests needed after a significant one-way ANOVA? (10)
For questions 3-5 on the one-way ANOVA, use the following data set. It reflects the scores of students on
worries about getting a job (0 = not at all worried to 10 = extremely worried). The students are divided into
three groups: sophomores, juniors, and seniors. Describe your work in SPSS, explaining what you did at each
step of the process.
Sophomores: 5, 2, 6, 5, 7, 3, 4, 4, 5, 2, 9, 7, 3, 4, 3, 6, 7, 7, 3, 6
Juniors: 3, 6, 8, 4, 7, 5, 6, 6, 4, 8, 8, 9, 4, 6, 3, 6, 10, 8, 8, 3
Seniors: 6, 4, 7, 9, 9, 2, 10, 6, 8, 5, 9, 9, 6, 3, 7, 9, 9, 10, 4, 6
3) For the above data set, enter the data into SPSS and do the one-way ANOVA. Interpret the overall F. (20)
4) Calculate and explain the results of the Tukey test, if needed. If not needed, explain why in 2-3 sentences.
(25)
5) Calculate and interpret the value of r squared. (10)
6) What are two reasons why correlation may not equal causation? (10)
7) In 2-3 sentences, briefly explain the problem of restricted range in correlation. (10)