1. A study of the Consideration of Future Consequences
(CFC) scale found a mean score of 3.51 and standard deviation
of 0.61 for the 664 students in the sample (Petrocelli, 2003). For
the sake of this exercise, let’s assume that Petrocelli’s sample
comprises the entire population of interest. You wonder whether
students who joined a career discussion group might have different
CFC scores compared with this population. Forty-five students in
your psychology department regularly attend these discussion groups
and then take the CFC scale. The mean for this sample is 3.7.
Conduct all of the steps for a two-tailed z-test. Use an alpha
level of 0.05.