1. (10 points) A zoologist collected wild lizards in the Southwestern United States. Thirty lizards from the genusPhrynosomawere placed on a treadmill and their speed measured. The recorded speed (meters/second) is the fastest time to run a half meter.

1.28 1.36 1.24 2.47 1.94 2.52 2.67 1.29

1.56 2.66 2.17 1.57 2.10 2.54 1.63 2.11

2.57 1.72 0.76 1.02 1.78 0.50 1.49 1.57

1.04 1.92 1.55 1.78 1.70 1.20

a. Find the sample median, first quartile, and third quartile.

b. Find the sample 90th percentile.

c. Calculatexand s.

d. Find the proportion of the observations that are in each of the intervals

xs,x2s, x 3s.