By Jay L. Devore, Matthew A. Carlton
Offers worked-out strategies to the odd-numbered difficulties within the textual content.
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Additional resources for Student Solutions Manual for Devore's Probability and Statistics for Engineering and the Sciences, 7th
B. 872 5 2 y 35 2 i n −1 = x. Chapter 1: Overview and Descriptive Statistics 70. a. Oxygen Consumption 25 20 15 10 5 0 Treadmill Weight Exercise Type There is a significant difference in the variability of the two samples. The weight training produced much higher oxygen consumption, on average, than the treadmill exercise, with the median consumptions being approximately 20 and 11 liters, respectively. b. 5. 0 5 10 15 Difference The majority of the differences are positive, which suggests that the weight training produced higher oxygen consumption for most subjects.
5)(4)(3) = 60 c. 5 5! 3! a. Because order is important, we’ll use P8,3 = 8(7)(6) = 336. b. Order doesn’t matter here, so we use C30,6 = 593,775. c. From each group we choose 2: d. The numerator comes from part c and the denominator from part b: e. We use the same denominator as in part d. We can have all zinfandel, all merlot, or all cabernet, so P(all same) = P(all z) + P(all m) + P(all c) = 30. 002 30 593,775 6 31. a. (n 1 )(n 2 ) = (9)(27) = 243 b. (n 1 )(n 2 )(n 3 ) = (9)(27)(15) = 3645, so such a policy could be carried out for 3645 successive nights, or approximately 10 years, without repeating exactly the same program.
6 7 34 17 stem=ones leaf=tenths 8 4589 9 1 10 12667789 11 122499 12 2 13 1 x = 9. 3 8. 6 no outliers 6 7 8 9 10 11 12 13 Radiation There are no outliers. The distribution is skewed to the left. 33 Chapter 1: Overview and Descriptive Statistics 65. a. 59. 41. b. 75. 63%. 33%. Thus, even though the CO data has a larger standard deviation than does the HC data, it actually exhibits less variability (in percentage terms) around its average than does the HC data. a. The histogram appears below. A representative value for this data would be x = 90.
Student Solutions Manual for Devore's Probability and Statistics for Engineering and the Sciences, 7th by Jay L. Devore, Matthew A. Carlton