STAT 2507 Study Guide - Midterm Guide: Interquartile Range, Quartile, Box Plot
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Midterm stat2507 (d, e, f) winter 2013 duration: 90 minutes closed book. Multiple choice questions part: every question is worth 5 marks. The following four questions are based on the following stem-and-leaf plot. A child is asked to draw two toys. The probability that both are red is: 1/12, 1/24, 2/3, 1/3, two variables x and y were measured on a sample of 20 individuals and we observed the following quantities: X x = 150, x y = 220, x x2 = 1250, x y2 = 2500, x xy = 1735. Then the correlation coe cient between x and y is: . 99, . 97, . 95, . 85, two variables x and y were measured on a sample of 25 individuals and they yielded the following quantities: X x = 180, x y = 200, x x2 = 2200, x y2 = 2300,
