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Unformatted text preview: CHAPTER 5 PROBLEMS 6, 10, 16, 17, 20, 22, 31, 45 Problem 6 The company is using the mean number of sick days, the union is using the median. The distribution is skewed to the right, with some number of employees having severe illness or injuries. Problem 10 a) In a) and c) Set 2 has a wider spread so the standard deviation will be larger. In b), the deviations are the same so the standard deviation will be the same. In the tables below the mean is denoted by ÿ, i.e., by an umlaut instead of an overline. This is because Excel cannot do overlines. b) a) Set 1 y ∑(yÿ)² σ 43 9 7 7 18 2.12 7 10 3 9 mean = 7 a) Set 2 y ∑(yÿ)² σ 43 9 61 1 7 20 2.24 8 1 1 10 3 9 mean = 7 b) Set 1 y ∑(yÿ)² σ 10050 2500 14010 100 150 5200 36.06 160 10 100 200 50 2500 mean = 150 yÿ (yÿ)² yÿ (yÿ)² yÿ (yÿ)² b) Set 2 y ∑(yÿ)² σ 10...
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 Spring '08
 Weaver
 Math, Statistics, Standard Deviation, yy

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