The national mean (µ) absentee rate for workers working for the Old Mill Store Company is reported as 8.25 days per year. The mean rate (X) for a sample of 14 workers working at your Old Mill Store franchise is reported as 7.53 days per year with a standard deviation (σ) of 2.72 days. Assume that you are working at the .05 level of significance.
a. State an appropriate null hypothesis.
b. What is the value of the calculated test statistic (t)?
c. Identify the critical value.
d. State your conclusion.