Question

The Grand Canyon and the Colorado River are beautiful, rugged, and sometimes dangerous. Assume there is a physician at the park clinic in Grand Canyon Village. Suppose the physician has recorded (for a 5-year period) the number of visitor injuries at different landing points for commercial boat trips down the Colorado River in both the Upper and Lower Grand Canyon. Compute a 5% trimmed mean for Upper Canyon and Lower Canyon. Round your answer to the nearest thousandth.

Upper Canyon: Number of injuries per Landing Point Between North Canyon and Phantom Ranch

2 3 1 1 3 4 9 12 3 1 3

Lower Canyon: Number of injuries per Landing Point Between Bright Angel and Lava Falls

11 1 1 0 9 10 2 13 3 0 1 12 2 1

Answer 1