Chap4Review

# Chap4Review - Chapter 4 Review 1(Page231 1 To study the...

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Chapter 4 Review 1. (Page231 1) To study the library habits of students at a local college, thirty randomly selected students were surveyed to determine the number of times they had been to the library during the last week. The following results were obtained. 1 5 2 1 1 4 2 1 5 4 5 2 5 1 2 3 4 1 1 2 3 5 4 1 2 2 4 5 1 2 Organize the given data by creating a frequency and relative frequency distribution. 2. A random sampling of the speeds of 12 cars monitored on a small stretch of highway yielded the following data: 45 60 50 65 60 55 60 50 75 65 55 60 a) find the mean speed b) find the median speed c) find the mode speed d) find the variance and standard deviation of the speeds. Round to the nearest hundredth. 3. (P233 15) The frequency distribution shown in the table below lists the ages of 200 randomly selected students who received a bachelor’s degree at State University last year. Where possible, determine what percent of the graduates had the following ages: a) less then twenty-three b) at least thirty-one c)

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