midterm1review

Midterm1review - Chapter 1 4 A survey records many variables of interest to the researchers conducting the survey The following are some of the

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Chapter 1 4 . A survey records many variables of interest to the researchers conducting the survey. The following are some of the variables from a survey conducted by the U.S. Postal Service. Which of the variables is categorical? * a. the county of residence b. the number of people, both adults and children, living in the household c. the total household income, before taxes, in 1993 d. the age of respondent Use the following to answer questions 10 – 11. A large Midwestern University is divided into six colleges, with most students graduating from four of these colleges. The following bar chart gives the distribution of the percentage graduating from the four most popular colleges in 2003. College Percent Business Engineering Math and Physical Sciences Biological Sciences 30 25 20 15 10 5 0 10 . The percentage of students graduating from the two other colleges in 2003 was a. approximately 40%. b. under 10%. * c. approximately 20%. d. over 50%. 11 . Which of the following is a correct statement? a. A timeplot of the 2003 distribution would be more informative. b. The bar graph is skewed to the right. c. The bar graph is skewed to the left. * d. It would be correct to make a pie chart if you added an “Other” category.
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For problems 12 – 14 use the following information. In a statistics class with 136 students, the professor records how much money each student has in his or her possession during the first class of the semester. The following histogram is of the data collected. 100 50 0 60 50 40 30 20 10 0 Amount of Money 10 20 30 40 60 12 . The number of students with under $10 in their possession is closest to a. 40. b. 50. * c. 60. d. 70. 13 . The histogram a. is skewed right. b. has an outlier. c. is asymmetric. * d. all of the above. 14 . The percentage of students with over $20 in their possession is a. about 10%. * b. about 20%. c. about 30%. d. over 40%.
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For a Physics course containing 10 students, the maximum point total for the quarter was 200. The point totals for the 10 students are given in the following stemplot. 11 6 8 12 1 4 8 13 3 7 14 2 6 15 16 17 9 17 . This stemplot is most similar to * a. a histogram with class intervals 110 score < 120, 120 score < 130, etc. b. a time plot of the data with the observations taken in increasing order. c. a boxplot of the data. d. reporting the five-point summary for the data, with the mean. 18 . To which of the following data sets does this stemplot correspond? a. all integers between 116 and 179 b. 1, 2, 3, 4, 6, 6, 7, 8, 8, 9 c. 16, 18, 21, 24, 28, 33, 37, 42, 46, 79 * d. 116, 118, 121, 124, 128, 133, 137, 142, 146, 179 19 . The lowest score in the class as a percentage of the total possible points is * a. 58%. b. 75%.
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This note was uploaded on 04/07/2008 for the course ECON 3818 taught by Professor Jessvechibany during the Spring '07 term at Colorado.

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Midterm1review - Chapter 1 4 A survey records many variables of interest to the researchers conducting the survey The following are some of the

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