midterm1-1

midterm1-1 - & Instructions and other rules: 1....

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Unformatted text preview: & Instructions and other rules: 1. Both the exam and the bubble sheet will be collected 2. You must print your name and sign the honor pledge on the bubble sheet. You must also bubble in your name and your student identification number. 3. Keep in mind that there are 22 questions, each worth 1 point. Each question has only one correct answer. 4. To fill out the bubble sheet, use only number 2 pencil. Do not use ink. Do not tear or fold the bubble sheet. A grade of zero will be assigned for the entire exam if the bubble sheet is not filled out according to the above instructions. !" 1. The two histograms below are obtained from the same data but using different bins. (In each bin, the left endpoint is included but the right one is not.) 15 20 25 30 35 40 45 50 55 60 Score 2 4 6 8 Count 15 30 45 60 Score Count Note that the vertical axis in the second histogram is not marked by numbers. However, the height of the highest bar in the second histogram is (1) 18. (2) 20. (3) 15. (4) Cannot be determined from the available information Page 2 2. Suppose that the variable Z has a standard normal distribution. The point z with 40% of observations falling above it, is about: (1) 0.14. (2)-0.25. (3) 0.25. (4) 0.65. 3. The following data gives the times (in rounded minutes) for the winner of the Boston marathon in the years 1991 to 2001: Year 91 92 93 94 95 96 97 98 99 00 01 Time 144 144 145 142 145 147 146 143 143 146 144 Which of the following can be used to describe the distribution of the winning times? (1) Time plot. (2) Box plot. (3) Pie chart. (4) None of the above. 4. The graph 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 is the boxplot of the following data: (1) 10, 20, 25, 30, 35, 40, 40, 45, 50, 80. (2) 10, 20, 25, 30, 35, 35, 40, 45, 50, 80. (3) 10, 20, 25, 30, 35, 35, 40, 45, 50, 90....
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midterm1-1 - & Instructions and other rules: 1....

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