Question: You strongly suspect that people are getting more creative. In the past (data from 1987) the average person scored 80 on the Smith Inventory of Creative Knowledge (SICK). The standard deviation for this population was 10. Drawing a random sample of 10 people in 1999, you obtain the following scores:
80, 88, 94, 73, 85, 89, 79, 83, 82, 85.
Using the appropriate statistical test, determine the outcome of the study:

a. Given all of the above data.
b. Assuming the population standard deviation was unknown data.