Section D: Homework 1) The exam scores for the students in an introductory statistics class are as follows: 34 39 63 64 67 70 75 76 81 82 84 85 86 88 89 89 90 96 96 99 102 Construct a stem-and-leaf plot and describe the shape of the distribution
Section D: Homework
1) The exam scores for the students in an introductory statistics class are as follows:
34 39 63 64 67 70 75 76 81 82 84 85 86 88 89 89 90 96 96 99 102
Construct a stem-and-leaf plot and describe the shape of the distribution.
2) Construct a stem-and-leaf plot for the following data and describe the shape of the distribution.
56 34 78 4 27 17 25 45 47 23 47 58
31 78 98 96 53 21 6 49 54 38 24 94
42 16 19 25 31 50 37 92 103 48 18 77
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3) A soft-drink bottler sells “one-liter” bottles of soda. A consumer group is concerned that the bottler
may be shortchanging customers. Thirty bottles of soda are randomly selected. The contents, in milliliters,
of the bottles chosen, are shown below.
1025 977 1018 975 977 990 986 1004 1031 964
986 963 1010 988 1028 989 1001 984 974 1017
1006 1030 991 999 997 996 1014 993 995 987
Construct a stem-and-leaf plot and describe the shape of the distribution.
Is the bottler shortchanging customers?
4) A sample of 35 liberal-arts graduates yielded the following starting annual salaries. Data are in
thousands of dollars, rounded to the nearest hundred dollars.
49.0 45.8 50.3 49.6 50.0 47.7 51.8 47.3 46.7 47.0 48.1 50.1 43.6 48.0
47.7 49.8 46.4 46.1 48.5 48.9 48.2 48.1 46.2 47.3 51.7 49.0 48.2 49.9
48.1 49.8 49.5 50.4 45.3 45.3 46.5
Construct a stem-and-leaf plot and describe the shape of the distribution.
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5) The following back-to-back stem-and-leaf plot represents the results of two random samples obtained
by Millie Gramm. The first random sample consisted of weights of carry-on luggage used by business
travelers at an airport. The second random sample consisted of weights of carry-on luggage used by nonbusiness travelers at the same airport.
Business Non-Business
69 0 89
799 1 2358
44468 2 11347889
23699 3 022246
178 4
24 5
a) What value occurs the most often for the business travelers?___________
b) What value occurs the most often for the non-business travelers?________
c) Which group is more symmetrical? ____________
We have given that data
34 39 63 64 67 70 75 76 81 82 84 85 86 88 89 89 90 96 96 99 102
For stem and leaf plot
Data Arrange in ascending order. But data is already in ascending order.
So, i want to make stem and leaf plot.
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