You hypothesize that your business experiences lower revenue on days following a full moon. You take a random sample of 16 days that followed a full moon and compute your average revenue from those days. What type of test do you use to determine if your hypothesis is correct?

a. One Sample Z-test

b. One Sample T-test

c. Two Sample Z-test

d. Two Sample T-test

e. You don't need to do a test since you already have sample data.