Chapter 15.4, Problem 3P

The three histograms in Figure 15.37 show the hypotheticalperformance of students in three different school districts on thesame test. A score below 40 on the test is considered failing. Ascore of 80 or above is considered excellent.



Figure 15.37 Performance of three hypothetical schooldistricts on a test.
a. Estimate the mean score on the test for each school district by viewing the mean as a balance point, as discussed in Section 15.3.
b. Discuss what information you can glean from the histograms that wouldn’t be apparent just from knowing the mean or median scores on the test.
c. Discuss how each school district could argue that it did better than at least one other school district.