Math 15 Quiz 3
1. Thomas Myers, a physician at the park clinic in Grand Canyon Village,
has recorded the number of visitor injuries at different landing
points for commercial boat trips down the Colorado River in the
Upper (Source: Fateful Journey by Myers, Becker, Stevens).
Upper Canyon:
Number of Injuries per Landing Point between North Canyon and
Phantom Ranch
2
3
1
1
3
4
6
9
3
1
3
Compute the mean, median, and mode for injuries per landing point in
the Upper Canyon. (Enter your answers to one decimal place.)
2. The Boston Marathon is the oldest and best known U.S. marathon. It
covers a route from Hopkinton, Massachusetts, to downtown
Boston. The distance is approximately 26 miles. Winning times for
the Boston Marathon are all over 2 hours. The following data are the
minutes over 2 hours for the winning male runners:
1961-1980:
23 23 18 19 16 17 15 22 13 10
18 15 16 13 9
20 14 10 9
12
Make a stem-and-leaf display for the minutes over 2 hours of the
winning times for the years 1961 to 1980. Use two lines per stem.