TY 10

p. 318-320

#s 2, 4-8

• For credit, show ALL WORK...for example, if asked to calculate a mean of two data points, type out:
  • xbar = (10+19)/2 = 14.5
• Be kind to your instructor...consider bolding/changing the color of your answer (as I did above) or using some other way to help me narrow in on your answer.

2. With more than two groups in a study, the appropriate statistical test to use is a _________________ .

a. one-way between-subjects ANOVA

b. one-way within-subjects ANOVA

c. independent samples t-test

d. multi-sample t-test

Answer:

4. A n A NOVA c a n tell you _________________ .

a. if your null hypothesis is true

b. if there is at least one mean difference across your sample means

c. which of your sample means are different from each other

d. both b and c

Answer:

5. An ANOVA should always be followed with a post hoc test.

a. True

b. False

Answer:

6. A post hoc test can tell you which of your sample means is different from the others.

a. True

b. False

Answer:

7. Conducting multiple tests to determine if multiple pairs of means from the same data are different will increase your chance of making at least one Type I error.

a. True

b. False

Answer:

8. A researcher tested the effect of type of music (classical, country, and rock) on subjects' mood. An alpha level of 0.05 was used in the test. The outcome of the ANOVA was F(2,65) = 16.91, p < 0.001.

a. What is the null hypothesis for this study?

Answer:

b. Is there evidence to reject the null hypothesis? How do you know?

Answer:

c. What can the researcher conclude from the outcome of this test?

Answer: