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Unformatted text preview: 1211 would be required. STATW1211.005 Prof. Zhang TR 02:40P03:55P Chapter 12: Question 11 a. expected change for a one degree increase = .01, and is the expected change for a 10 degree increase. b. , and . c. The probability that the first observation is between 2.4 and 2.6 is . The probability that any particular one of the other four observations is between 2.4 and 2.6 is also .8164, so the probability that all five are between 2.4 and 2.6 is . d. Let Y 1 and Y 2 denote the times at the higher and lower temperatures, respectively. Then Y 1  Y 2 has expected value . The standard deviation of Y 1  Y 2 is . Thus . Question 19 N = 14, , , , , a. , , so we use the equation . b. c. Estimated expected change d. No, the value 500 is outside the range of x values for which observations were available (the danger of extrapolation). Question 23 a. Using the given y i ’s and the formula , . The computation formula gives b. so ....
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 Spring '08
 Hernandez
 Statistics, Probability, Statistical hypothesis testing, Prof. Zhang, gi problems, Jay L. Devore, p1 p2

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