staticstic

MAT150.5 Statistics Assignment #2

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1. The following is average pulse rates of all students in a class

68 105 95 80 90 100 75 70 84 98 102 70

65 88 90 75 78 94 110 120 95 80 76 108

a. Use the table to create a Frequency Table to simplify the data.

Inches of Rainfall per Year

Classes Tally Frequency Midpoint Cumulative Frequency

b. Create a histogram for the data. Include all labels.

c. Use the frequency table to estimate the mean.

2. The data represent the scores of a biology class on a midterm exam. 75 85 90 80 87 71 82 88 95 91 73 80 83 92 94 71 75 91 79 95 87 76 91 85 a. Create a stem and leaf plot of these data.

b. Construct a frequency distribution, midpoint and cumulative frequency with a lower class limit of 71 and a class width 5.

c. Given the above frequency table, build each of the following charts: frequency histogram; frequency polygon.