Multiple choice questions:
1. 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

2. 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

3. The parameters of the binomial probability distribution are
a. n, p, and q
b. n and p
c. n, p, and x

4. 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

5. The binomial probability distribution is symmetric if
a. p < .5
b. p = .5
c. p >  .5

6. The binomial probability distribution is skewed to the right if
a. p < .5
b. p = .5
c. p > .5

7. The binomial probability distribution is skewed to the left if

a. p < .5
b. p = .5
c. p > .5

8. The parameter/parameters of the Poisson probability distribution is/are

a. λ
b. λ and x
c. λ and e