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In Exercises 5.31–5.35, we have provided the
5.32 Persons per Housing Unit. The random variable Y is the number of persons living in a randomly selected occupied housing unit. Its probability distribution is as follows.
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Introductory Statistics (10th Edition)
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- Part carrow_forwardrofessor Cornish studied rainfall cycles and sunspot cycles. (Reference: Australian Journal of Physics, Vol. 7, pp. 334-346.) Part of the data include amount of rain (in mm) for 6-day intervals. The following data give rain amounts for consecutive 6-day intervals at Adelaide, South Australia. 7 28 7 1 69 3 1 4 22 7 16 4 54 160 60 73 27 3 3 1 7 144 107 4 91 44 1 8 4 22 4 59 116 52 4 155 42 24 11 43 3 24 19 74 26 63 110 39 34 71 52 39 8 0 15 2 14 9 1 2 4 9 6 10 (i) Find the median. (Use 1 decimal place.)(ii) Convert this sequence of numbers to a sequence of symbols A and B, where A indicates a value above the median and B a value below the median. Test the sequence for randomness about the median at the 5% level of significance. (b) Find the number of runs R, n1, and n2. Let n1 = number of values above the median and n2 = number of values below the median. R n1 n2 (c) In the case, n1 > 20, we cannot use Table 10 of Appendix II to find the critical…arrow_forwardA company held a blood pressure screening clinic for its employees. The results are summarized in the table below by age group and blood pressure level. Low Normal High 21 d) Select a brief description of the association between age and blood pressure among these employees. OA. The percentage of employees having low blood pressure increases and the percentage having high blood pressure increases as they age. OB. The percentage of employees having low blood pressure decreases and the percentage having high blood pressure decreases as they age. OC. The percentage of employees having low blood pressure increases and the percentage having high blood pressure decreases as they age. OD. The percentage of employees having low blood pressure decreases and the percentage having high blood pressure increases as they age. e) Does this prove that people's blood pressure levels increase as they age? Explain. A. No, because only a controlled experiment can isolate the relationship between age and…arrow_forward
- Major League Baseball (MLB) consists of teams that play in the American League and the National League. MLB collects a wide variety of team and player statistics. Some of the statistics often used to evaluate pitching performance are as follows: • ERA: The average number of earned runs given up by the pitcher per nine innings. An earned run is any run that the opponent scores off a particular pitcher except for runs scored as a result of errors. • SO/IP: The average number of strikeouts per inning pitched. • HR/IP: The average number of home runs per inning pitched. • R/IP: The number of runs given up per inning pitched. The following data show values for these statistics for a random sample of 20 pitchers from the American League for one full season. Player Тeam W ERA SO/IP HR/IP R/IP Verlander, J DET 24 2.40 1.00 0.09 0.29 Beckett, J BOS 13 7 2.88 0.92 0.12 0.35 Wilson, C TEX 16 7 2.93 0.93 0.08 0.40 Sabathia, C ΝY 19 8. 3.01 0.97 0.06 0.36 Haren, D LAA 16 10 3.16 0.80 0.08 0.37…arrow_forwardLisa's scores on tests for the assessment class are 93, 89, 87, and 83. She needs an 89.5 average to obtain an "A" in the class. Assuming that all tests, including the final, are equally weighted, what score must she obtain on the final exam to earn an "A"? CA Vimsi larrow_forwardThe figure below is a histogram showing the distribution of serum cholesterol level for a sample of men. Use the histogram to answer the following questions:a) Is the percentage of men with cholesterol levels above 240 mg/dL closest to 30%, 50%, or 70%?b) In which interval are there more men: 240–260 mg/dL or 280–340 mg/dL?arrow_forward
- Find the principal components of the data for Exercise 2. Reference Exercise 2: 5 2 6. 3 11 3 11 6. 15 ["arrow_forwardFind the standard deviation of each random variable shown. The mean for part a is 2.3, and the mean for part b is 340. a) x 1 2 3 P(X=x) 0.2 0.3 0.5 b) x 200 300 400 500 P(X=x) 0.3 0.2 0.3 0.2arrow_forwardcalculate d and e with good working outs ...arrow_forward
- Holt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL