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Data Analysis

Data Analysis. CRCT Review. #1. The line plot below shows the number of pets in each of ten households. The line plot shows which set of data? 1, 0, 1, 1, 2, 2, 3, 4, 1, 2 1, 0, 2, 2, 3, 4, 1, 1, 2, 3 1, 0, 1, 2, 1, 2, 2, 2, 2, 3 2, 1, 0, 1, 2, 3, 4, 1, 2, 2, . X.

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Data Analysis

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  1. Data Analysis CRCT Review

  2. #1 The line plot below shows the number of pets in each of ten households. The line plot shows which set of data? • 1, 0, 1, 1, 2, 2, 3, 4, 1, 2 • 1, 0, 2, 2, 3, 4, 1, 1, 2, 3 • 1, 0, 1, 2, 1, 2, 2, 2, 2, 3 • 2, 1, 0, 1, 2, 3, 4, 1, 2, 2, X X X X X X XXXX 0 1 2 3 4

  3. #2 The line plot below shows the number of pets in each of ten households. What is the median for this set of data? • 1 • 1.5 • 2 • 2.5 X X X X X X XXXX 0 1 2 3 4

  4. #3 Harold looked at some of the books on his bookshelf. He recorded the number of pages in some of the books below. 87, 100, 25, 89, 96, 100, 95, 97, 85 Is the mean the best measure of central tendency to describe the number of pages of the books on his bookshelf? • Yes, the mean, 86, best represents the number of pages of the books on his bookshelf. • No, the mean, 86, is not the best measure of central tendency to describe this situation. The range, 75, best describes this situation. • No, the mean, 86, is not the best measure of central tendency to describe this situation. The mode, 100, best describes this situation. • No, the mean, 86, was affected by the shortest book having 25 pages. The best measure of central tendency in this situation would be the median, 95.

  5. #4 What is the range of the data shown below? 42, 48, 54, 41, 80, 41, 44 • 39 • 41 • 48 • 50

  6. #5 Val’s school sold cookbooks as a fundraiser. The mean number of cookbooks sold by the 22 students in Val’s seventh grade class was 9. The mean number of cookbooks sold by the 540 students in the school was 4. Which statement is true? • The range of cookbooks sold by the school is 5 • The mode of the cookbooks sold by Val’s class is the same as the mode of the cookbooks sold by the school. • The means are so different because Val’s class is a small sample when compared to the entire school. • Val’s class did not try hard enough to sell the cookbooks.

  7. #6 Ms. Evans surveyed members of her company to determine how many e-mails they received each day. She summarized her results in the box-and-whisker plot shown below. Between which two amounts were 50% of the responses? • 8 and 32 B. 8 and 104 C. 32 and 72 D. 48 and 72

  8. #7 Ms. Evans surveyed members of her company to determine how many e-mails they received each day. She summarized her results in the box-and-whisker plot shown below. What is the interquartile range? • 40 B. 64 C. 72 D. 96

  9. #8 The scores of ten students’ Spanish tests are listed below. • 96 68 85 73 74 98 91 62 81 What can you conclude from the data? • The mean, median, and mode are all equal. • The mode is greater than the median or the mean. • The median is greater than the mode and the mean. • The mean is greater than the median and the mode.

  10. #9 Mallika measured the resting pulses of several people. She analyzed the data and determined that the upper quartile was 90 beats per minute. What percent of the data is greater than 90 beats per minute? • 25% • 50% • 75% • 100%

  11. #10 Sabrina is comparing the weights of several vehicles. What kind of graph would best display her data? • Line graph • Circle graph • Line plot • Bar graph

  12. The bar graph shows the number of days of rainfall in a city for the months of April 2002 and April 2003. #11 Comparison of Rainfall Days of Rainfall Rainfall (inches) Which statement is NOT supported by the information in this graph? April 2003 had less rain than April 2002. There were more days with 1 inch of rain in April 2003 than any other amount There were no days of 5 inches of rain during April 2003. April 2003 was the rainiest month of the year.

  13. #12 Which value is the first quartile of the following data set? 14, 16, 16, 17, 18, 19, 24, 25, 25, 26, 28 • 19 • 16 • 17.5 • 17

  14. #13 Jessica recorded the noon temperature in her backyard each day for 30 consecutive days. Which type of graph would best show the trend in the noon temperatures over that time? • circle graph B. histogram C. line graph D. box-and-whisker plot

  15. #14 What is the mean? 31 32 33 34 35 35 45 • 33 • 34 • 35 • 36

  16. #15 A data set consists of 10 numbers. Nine of them are 5. Which best describes the data value 5? • mean • median • mode • range

  17. #16 The scatter plot shows temperature readings. Which is the most likely reading for 1:30 P.M.? • 70°F • 77°F • 88°F • 92°F

  18. #17 Suppose 49 out of 100 people at a fair support a candidate. Which is the best conclusion? A. The race is close B. The candidate will lose C. The candidate will win D. Polling is not useful in local elections

  19. #18 Which box-and-whisker plot represents the following data? 14 16 16 17 18 19 24 25 25 26 28

  20. #19 In a set of 20 data values, 5 occurs 6 times, 8 occurs 8 times, 10 occurs 2 times, and 11 occurs 4 times. How can this data NOT be represented? • histogram • bar graph • line graph • circle graph

  21. #20 What is the median? 31 32 33 34 35 35 45 • 33 • 34 • 35 • 36

  22. #21 A set of data contains exactly 24 numbers. The range of the data set is 0. Which of the following is true? • The mean of the data is 0 • All of the data values are the same number. • The median of the data is 0. • All of the data values are different from one another.

  23. #22 Which statement best describes the relationship between x and y? • As x increases, y increases • As x increases, y decreases • There is no relationship • There is not enough information

  24. #23 A candidate for mayor wants to poll voters to see how well her campaign is doing. Which of the following would be the best sample for this poll? A. all registered democrats in the city B. every person who has ever called the mayor’s office C. a randomly selected group of registered voters D. parents dropping their kids off at school

  25. #24 Which number is the interquartile range for this data set? • 10 B. 2 C. 4 D. 7

  26. #25 Which frequency table represents the graph? A. B. C. D.

  27. #26 What is the mode? 31 32 33 34 35 35 45 • 33 • 34 • 35 • 36

  28. #27 Which set of data values has the greatest range but the smallest median? • 1, 98, 98, 98, 101 • 1, 2, 50, 98, 101 • 3, 4, 4, 4, 103 • 5, 20, 30, 90, 101

  29. #28 Which line appears to be the line of best fit for the data on the graph? • line A • line B • line C • none

  30. #29 What is wrong with having television viewers picking the best singer on a talent show? • Most people cannot judge talent. • The phone lines may be busy. • The network may not report the results accurately. • People can vote based on things other than talent.

  31. #30 Which number is the range of the data set? • 10 B. 2 C. 4 D. 7

  32. #31 Craig took two tests and got 75% and 80%. What scores does Craig have to get on the next test to have a mean score of 80%? • 80% • 82% • 84% • 85%

  33. #32 Which is the third quartile of this data set? 11 11 14 16 19 20 21 21 • 17.5 • 20 • 20.5 • 21

  34. #33 In a scatter plot comparing x and y, the line of best fit is horizontal. Which statement best describes the relationship between x and y? A. As x increases, y increases B. As x increases, y decreases C. As x increases, y stays the same D. As y increases, x stays the same

  35. #34 Three people are asked to try a new juice drink. Two of them like it. What is the best conclusion? A. The drink is good. B. More people should be asked. C. The drink should be improved. D. Individual reports are unreliable.

  36. #35 Which line is most likely to be the line of best fit for the data? • a horizontal line through (2, 10) and (8, 10) B. a vertical line through (5, 4) and (5, 16) C. a line that rises from left to right D. a line that falls from left to right.

  37. #36 Which number is the first quartile of the data set? • 7 B. 8 C. 11 D. 15

  38. #37 Which type of graph would best represent expenses in a month related to the total amount spent? • circle graph • histogram • bar graph • line graph

  39. #38 Craig took two tests and got 75% and 80%. What scores does Craig have to get on the next test to have a mode score of 80%? • 80% • 82% • 84% • 85%

  40. #39 The data below are the prices in dollars of CD at two local stores. Store I: 10, 10, 11, 12, 14, 20 Store II: 10, 10, 11, 12, 14, 15 Which of the following is NOT a correct comparison for the two sets of prices? • The mean for Store I is greater • The median for Store I is greater • The modes are the same • The range for Store I is greater

  41. #40 Which is the most likely value of y when the value of x is 5? • 15 • 10 • 0 • 5

  42. #41 The table shows how many people preferred each brand of cereal. Which conclusion is justified? A. There is no clear favorite cereal. B. All the cereals are the same. C. Cereal is only for children. D. The surveyors need to take a new sample.

  43. #42 Which value is the median of the data set? • 7 B. 8 C. 11 D. 15

  44. #43 Which type of graph would be the best choice to show how often each data value occurs in the data set? • scatter plot • line graph • circle graph • histogram

  45. #44 Craig took two tests and got 75% and 80%. What scores does Craig have to get on the next test to have a median score of 80%? • any score 75% or less • any score between 75% and 80% • any score over 80% • 75%

  46. #45 Emma recorded the temperature each hour from 4 A.M. until noon one day. She displayed the data in a scatter plot. Which statement is most likely to be true about the relationship between time and temperature on her scatterplot? • As time passes, the temperature increases. • As time passes, the temperature decreases. • As time passes, the temperature stays the same. • As the temperature increases, time stays the same.

  47. #46 In a sample of voters in Newtown, 18 out of 25 favored building a new junior high school. If 50,000 people vote in the next Newtown election, how many are likely to vote in favor of the new school based on this sample? • 900,000 • 2000 • 36,000 • 18,000

  48. #47 In a set of data, the value of y decreases as the value of x increases. Which diagram could be a scatter plot of the data?

  49. #48 • Which value is the third quartile of the data set? • 7 B. 8 C. 11 D. 15

  50. #49 Greg used a circle graph to show sales for each month in a year. Which type of graph is a more appropriate choice? • bar graph • histogram • line graph • frequency table

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