Percent 4 008 8 106 120 5 22 136 150 18

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Percent Frequency 91-105 4 0.08 8 106-120 5 0.10 10 121-135 11 0.22 22 136-150 18 0.36 36 151-165 9 0.18 18 166-180 3 0.06 6 Total 50 1.00 100 c. Proportion $135,000 or less: 20/50. d. Percentage more than $150,000: 24%
24 e. 19. a/b. Number Frequency Relative Frequency 140 - 149 2 0.10 150 - 159 7 0.35 160 - 169 3 0.15 170 - 179 6 0.30 180 - 189 1 0.05 190 - 199 1 0.05 Totals 20 1.00 c/d. Number Cumulative Frequency Cumulative Relative Frequency Less than or equal to 149 2 0.10 Less than or equal to 159 9 0.45 Less than or equal to 169 12 0.60 Less than or equal to 179 18 0.90 Less than or equal to 189 19 0.95 Less than or equal to 199 20 1.00 0 2 4 6 8 10 12 14 16 18 20 91-105 106-120 121-135 136-150 151-165 166-180 Salary ($1000s) Frequency
e. 5 10 15 20 140 160 180 200 Frequency 20. a. The percentage of people 34 or less is 20.0 + 5.7 + 9.6 + 13.6 = 48.9. b. The percentage of the population over 34 years old is 16.3 + 13.5 + 8.7 + 12.6 = 51.1 c. The percentage of the population that is between 25 and 54 years old inclusively is 13.6 + 16.3 + 13.5 = 43.4 d. The percentage less than 25 years old is 20.0 + 5.7 + 9.6 = 35.3. So there are (.353)(275) = 97.075 million people less than 25 years old. e. An estimate of the number of retired people is (.5)(.087)(275) + (.126)(275) = 46.6125 million. 21. a/b. Computer Usage (Hours) Frequency Relative Frequency 0.0 - 2.9 5 0.10 3.0 - 5.9 28 0.56 6.0 - 8.9 8 0.16 9.0 - 11.9 6 0.12 12.0 - 14.9 3 0.06 Total 50 1.00
26 c. 0 5 10 15 20 25 30 0.0 - 2.9 3.0 - 5.9 6.0 - 8.9 9.0 - 11.9 12.0 - 14.9 Computer Usage (Hours) Frequency d. 10 30 3 50 20 40 0 Computer Usage (Hours) Frequency 6 9 12 15 60 e. The majority of the computer users are in the 3 to 6 hour range. Usage is somewhat skewed toward the right with 3 users in the 12 to 15 hour range.
22. 5 7 8 6 4 5 8 7 0 2 2 5 5 6 8 8 0 2 3 5 23. Leaf Unit = 0.1 6 3 7 5 5 7 8 1 3 4 8 9 3 6 10 0 4 5 11 3 24. Leaf Unit = 10 11 6 12 0 2 13 0 6 7 14 2 2 7 15 5 16 0 2 8 17 0 2 3
28 25. 9 8 9 10 2 4 6 6 11 4 5 7 8 8 9 12 2 4 5 7 13 1 2 14 4 15 1 26. Leaf Unit = 0.1 0 4 7 8 9 9 1 1 2 9 2 0 0 1 3 5 5 6 8 3 4 9 4 8 5 6 7 1
27. 4 1 3 6 6 7 5 0 0 3 8 9 6 0 1 1 4 4 5 7 7 9 9 7 0 0 0 1 3 4 4 5 5 6 6 6 7 8 8 8 0 1 1 3 4 4 5 7 7 8 9 9 0 2 2 7 or 4 1 3 4 6 6 7 5 0 0 3 5 8 9 6 0 1 1 4 4 6 5 7 7 9 9 7 0 0 0 1 3 4 4 7 5 5 6 6 6 7 8 8 8 0 1 1 3 4 4 8 5 7 7 8 9 9 0 2 2 9 7
30 28. a. 0 5 8 1 1 1 3 3 4 4 1 5 6 7 8 9 9 2 2 3 3 3 5 5 2 6 8 3 3 6 7 7 9 4 0 4 7 8 5 5 6 0 b. 2000 P/E Forecast Frequency Percent Frequency 5 - 9 2 6.7 10 - 14 6 20.0 15 - 19 6 20.0 20 - 24 6 20.0 25 - 29 2 6.7 30 - 34 0 0.0 35 - 39 4 13.3 40 - 44 1 3.3 45 - 49 2 6.7 50 - 54 0 0.0 55 - 59 0 0.0 60 - 64 1 3.3 Total 30 100.0 29. a.
y x A B C 5 11 2 0 2 10 12 18 5 13 12 30 Total 1 2 Total b. y x A B C 100.0 84.6 16.7 1 0.0 15.4 83.3 2 100.0 100.0 100.0 Total c. y x A B C 27.8 61.1 11.1 100.0 0.0 16.7 83.3 100.0 1 2 Total d. Category A values for x are always associated with category 1 values for y. Category B values for x are usually associated with category 1 values for y. Category C values for x are usually associated with category 2 values for y. 30. a.
32 -40 -24 -8 8 24 40 56 -40 -30 -20 -10 0 10 20 30 40 x y b. There is a negative relationship between x and y; y decreases as x increases. 31. Meal Price ($) Quality Rating 10-19 20-29 30-39 40-49 Good 53.8 33.9 2.7 0.0 Very Good 43.6 54.2 60.5 21.4 Excellent 2.6 11.9 36.8 78.6 Total 100.0 100.0 100.0 100.0 As the meal price goes up, the percentage of high quality ratings goes up. A positive relationship between meal price and quality is observed. 32. a. EPS Rating Sales/Margins/ROE 0-19 20-39 40-59 60-79 80-100 Total A 1 8 9 B 1 4 5 2 12 C 1 1 2 3 7 D 3 1 1 5 E 2 1 3 Total 4 4 6 9 13 36 b. EPS Rating Sales/Margins/ROE 0-19 20-39 40-59 60-79 80-100

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