The distribution of hours worked per week by wives in the United States in the early 1990s had a mean of 26.0 and a standard deviation of 17.2.
a. Tell whether 26.0 is a sample or population mean, and identify it with proper notation.
b. Without actually calculating values of z, tell whether each of these sample means will have a positive or negative standardized score: 40, 30, 25, 20.
c. Without actually calculating values of z, tell which one of these sample means will have the most extreme standardized score: 40, 30, 25, 20.
d. Tell which of these samples means will have the least extreme standardized score: 40, 30, 25, 20.