Multiple choice questions:
3. For the probability distribution of a discrete random variable, the probability of any single value of x is always
a. in the range 0 to 1
b. 1.0
c. less than zero
4. For the probability distribution of a discrete random variable, the sum of the probabilities of all possible values of x is always
a. greater than 1
b. 1.0
c. less than 1.0
6. The parameters of the binomial probability distribution are
a. n, p, and q
b. n and p
c. n, p, and x
7. The mean and standard deviation of a binomial probability distribution with n 25 and p .20 are
a. 5 and 2
b. 8 and 4
c. 4 and 3
8. The binomial probability distribution is symmetric if
a. p < .5
b. p = .5
c. p > .5
9. The binomial probability distribution is skewed to the right if
a. p < .5
b. p = .5
c. p > .5
10. The binomial probability distribution is skewed to the left if
a. p < .5
b. p = .5
c. p > .5
12. The parameter/parameters of the Poisson probability distribution is/are
a. λ
b. λ and x
c. λ and e