Section 5.4

Exercise Set D: 2, 3

Section 5.5

Exercise Set E: 1, 2, 3

Also:

1. Suppose the following 20 birth weights (in ounces) were recorded at a maternity ward: 131, 120, 112, 88, 114, 128, 133, 104, 108, 94, 133, 124, 84, 132, 107, 144, 93, 114, 116, 120. Use R to compute the the first and third sample quartiles of the birthweights, and the interquartile range.
2. For the data in http://dananne.org/fu/courses/math-241/R/height.txt, use R to compute (a) the first and third sample quartiles, (b) the 60th sample percentile, and (c) the 10th sample percentile.

Answers:

1. First quartile: 106.2; Third quartile: 128.8; Interquartile range: 22.6
2. (a) First quartile: 66.39; Third quartile: 72.03 (b) 70.38 (c) 63.69