Math Statistics 11.1
19. A weather reporter recorded the following temperatures in degrees Fahrenheit during the month of June: 77 80 82 68 65 59 61 57 50 62 61 70 69 64 67 70 62 65 65 73 76 87 80 82 83 79 79 71 80 77 The reporter made a stem and leaf plot to show this information to viewers visiting the website. What is true about the weather in June based on the information in the stem-and-leaf plot?
A. The mode temperature was 70°.
B. The mean temperature was 70°.
C. The median temperature was 70°.
D. The range of temperatures was 70°.
20. The populations over age 60 are listed in the table above for each county in the metro area for the year 2000. Part A Use the data from the table to find the range of the population over 60. Part B Use the data from the table to find the first quartile and the third quartile. Explain how the quartiles divide the data.
21. Marco’s credit card purchases for March are listed in the table above. What is the range of the data set?
A. $185.25
B. $65.50
C. $305.00
D. $239.50
22. The following table lists the daily high temperatures in degrees Fahrenheit recorded in Destin, Florida during the first seven days of April in 2006. What is the maximum value of the data set? 75° 74° 56° 76° 77° 77° 78°
A. 56°
B. 75°
C. 77°
D. 78°
23. What is the minimum value of the following data set? 68, 66, 63, 70, 65, 62, 68, 63, 68, 70
A. 68
B. 62
C. 63
D. 65
24. In eight rounds during 2 tournaments at a golf course, Roger scored the following: -1, +7, +5, +6, +2, +2, +1, +2 Part A What is the mode of the data set? Show or explain how to find the mode. Part B What is the mean of the data set? A lower score is better, so does Roger want to report his mean score or the mode?
25. Kate records the number of pages she reads each day during a week. She read only 30 pages on Sunday. Which measure of data changed the most when she included Sunday’s pages read?
A. mean
B. mode
C. median
D. All measures changed the same
26. Ben wants to know the most common salary of an employee at a company where he is applying for a job. He wants to know the
A.mean
B. mode
C. median
D. outlier
27. The numbers shown are student scores on a 32 point test. What is the standard deviation (rounded to the nearest tenth)? 27 30 28 27 26 25 24 29 32 32
A. 2.6
B. 8.0
C. 6.8
D. 3.2
28. Carla’s class weighed their backpacks and collected the following data. Part A Find the median value of the data. Show your work or explain your answer. Part B Find the lower quartile, and the upper quartile of the data set. Show your work or explain your answers.
29. Mr. Stephenson averages the points earned out of 100 on the tests he gives during the semester for a final grade. Liz earned the following points out of 100 on her tests. 90, 85, 85, 45, 85, 90, 80 Part A Find the average points earned. Include all of the test values in your calculation. Show or explain your work. Part B This time do not include the outlier. Find the average points earned not including the outlier. Explain why Liz does not want to include the outlier in the calculation for her final grade.
30. Ten of eleven ballots collected for class president for Mr. Schmidt’s class are shown. Using a run-off method of voting, which of the following ballots would need to be cast as the eleventh ballot in order for Al to win?
0%
0
A
0%
0
B
0%
0
C
0%
0
D
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