Multiple choice questions:
1. The random variable x2 assumes only
a. Positive
b. Nonnegative
c. Non-positive values
2. The parameter(s) of the chi-square distribution is (are)
a. Degrees of freedom
b. df and n
c. x2
3. Which of the following is not a characteristic of a multinomial experiment?
a. It consists of n identical trials.
b. There are k possible outcomes for each trial and k  2.
c. The trials are random.
d. The trials are independent.
e. The probabilities of outcomes remain constant for each trial.
4. The observed frequencies for a goodness-of-fit test are
a. The frequencies obtained from the performance of an experiment
b. The frequencies given by the product of n and p
c. the frequencies obtained by adding the results of a and b
5. The expected frequencies for a goodness-of-fit test are
a. The frequencies obtained from the performance of an experiment
b. The frequencies given by the product of n and p
c. The frequencies obtained by adding the results of a and b
6. The degrees of freedom for a goodness-of-fit test are
a. n = 1
b. k – 1
c. n + k – 1
7. The chi-square goodness-of-fit test is always
a. Two-tailed
b. Left-tailed
c. Right-tailed
8. To apply a goodness-of-fit test, the expected frequency of each category must be at least
a. 10
b. 5
c. 8
9. The degrees of freedom for a test of independence are
a. (R – 1)(C – 1)
b. n – 2
c. (n – 1)(k – 1)