The Human Resources Director for a large company is studying absenteeism among hourly workers. A sample of 120 day shift employees showed 15 were absent more than five days last year. A sample of 80 afternoon employees showed 18 to be absent five or more times. At the 0.01 significance level can we conclude that there is a higher proportion of absenteeism among afternoon employees?
a. State the null and alternate hypotheses.
H0:
H1:
b. Find the critical value:
c. Compute the value of the test statistic.
d. Calculate the p-value.
d. What is your decision regarding the null hypothesis?