Assignment 8a
PSYC340 Research Methods I

1. ______ statistics are used in the process of hypothesis testing.
a. Descriptive
b. Null
c. Alternative
d. inferential

2. Inferential statistics allow us to:
a. infer something about the sample based on the population.
b. infer something about the population based on the sample
c. infer that the sample is representative
d. do all the above

3. No effect is to _____ hypothesis as effect is to _____ hypothesis.
a. null; alternative
b. alternative; null
c. one-tailed; two-tailed
d. two-tailed; one tailed

4. Ho is to Ha as ______ hypothesis is to ______ hypothesis.
a. null; alternative
b. alternative; null
c. one-tailed; two-tailed
d. two-tailed; one tailed

5. One and two-tailed hypotheses are both types of ______ hypotheses.
a. null
b. alternative
c. directional
d. non-directional

6. When using a ____ hypothesis, the researcher predicts the direction of the expected difference between the groups.
a. null
b. non-directional
c. one-tailed
d. two-tailed

7. A false alarm is to ____ as a miss is to _____.
a. Type I error; Type II error
b. Type II error; Type I error
c. null hypothesis; alternative hypothesis
d. alternative hypothesis; null hypothesis

8. Failing to reject Ho when we should have rejected it is a ____ error.
a. Type I
b. Type II
c. null
d. one-tailed

9. If researchers report that the results from their study were significant, p < .05, this means that:
a. if they conducted the study over they would get the same results less than 5 times in 100.
b. the results are untrustworthy.
c. we would expect the results to occur by chance less than 95 times out of 100.
d. we would expect the results to occur by chance less than 5 times out of 100.

10. _____ are most often used with interval or ratio data, whereas ______ are most often used with ordinal or nominal data.
a. t tests; z tests
b. z tests; t tests
c. Parametric tests; nonparametric tests
d. Nonparametric tests; parametric tests 11. Identify when it would be appropriate to use a parametric versus a nonparametric test.

12. What are inferential statistics and how do they differ from descriptive statistics?