The probability of an intersection of two events is computed using the _____.
a. addition law
b. subtraction law
c. multiplication law
d. division law
Question 2
A researcher is interested in determining the average number of years of employee retention in a company. If past information shows a population standard deviation of 7 months, what sample size should be taken so that, at 95 confidence, the margin of error will be 2 months or less?
