You think that people's satisfaction in our health system has decreased recently. You discover that in a research project done 5 years ago people were asked to rate how satisfied they were with the health system was on a scale of 1-100 (higher number indicates more satisfied). You manage to find 25 people who were in that study 5 years ago and ask them the same question now. In the original study the mean rating was 78.2 (variance = 3.1) but now it is 67.2 (variance = 13.2).

a) What is the appropriate hypothesis test

c) Would you do a .05 or .01 test WHY?

d) Would you do a one or two tailed test WHY?