1. If we use the standard normal distribution, the probability of obtaining a z-value between 1 and 2 is:

a. 0.0228

b. 0.4772

c. 0.1359

d. 0.3143

2.) Null and alternative hypotheses are statements about:

a. it depends - sometimes population parameters and b. sometimes sample statistics

c. sample parameters

population parameters

d. sample statistics

3.) A standardized z-value

a. applies only to the Poisson b. distribution

must be positive

c. expresses distance from the mean in units of the standard deviation

d. All of the choices