20. The data on the age (in years) of each of the 20 most powerful
women in a region are shown below.
49
62
52
……………………………………….64
21. The salaries of superstar professional athletes receive much
attention in the media. The multimillion-dollar long-term contract is
now commonplace among this elite group. Nevertheless, rarely does a
season pass without negotiations between one or more of the players’
associations and team owners for additional salary and fringe benefits
for all players in their particular sports. Complete parts a and b below.
22. Calculate the range, variance, and standard deviation for the
following sample.
3, -3,2,……………….4
23. A university’s language professors incorporated a 10-week
extensive redaing program into a second-semester Japanese language
course in an effort to improve students’ Japanese reading
comprehension. Fourteen students participated in this reading
program. Complete parts a through c.
24. A country’s Energy Information Administration monitors all
nuclear power plants operating in that country. The table to the right
lists the number of active nuclear power plants operating in each of a
sample of 10 states.
25. A study of 100,000 first-time candidates for the CPA exam found
that the mean number of semester hours of college credit taken by the
candidates was 144.58 hours. The standard deviation was reported to
be 15.73 hours. Complete parts a through c.
26. Compute the z-score corresponding to each of the values of x
below.
27. Compare the z-scores to decide which of the x values below lie
the greatest above the mean and the greatest distance below the mean.
28. A sample data set has a mean of 74 and a standard deviation of
10. Determine whether each of the following sample measurements
are outliers.
29. Consider the horizandal box shown to the right.
30. Educators are constantly evaluating the efficacy of public schools
in the education and training of students. One quantitative assessment
of change over time is the difference in scores on the SAT. The table