Chapter4(TextBookSolutions)Fall2012.doc

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Department
Quantitative Methods
Course
QMS 202
Professor
Jason Chan
Semester
Fall

Description
Chapter 4 4.1 a. $1295 b. $410 4.2 a. $21.78 b. $76.17 c. $21.56 d. $90.55 4.3 40.2% 4.4 $1.50 4.5 $0.938=$0.94 4.6 $16.67 4.7 a. 10.5 b. $29 c. $28.90 4.8 a. $2639000 b. $422245000 c. 22.3% 4.9 a. $24752 b. $7989 4.10 a. under 50 years old – mean, over 50 years old – median b. $450 1 4.11 a. $398 b. $5.88 c. median d. $5.22 million 4.12 33 days 4.13 a. higher for 3-star b. 200.5 c. 8.5 million 4.14 a. $29353 b.3.02% 4.15 a. $1509.14 b. 126 people 4.16 12202 students 4.17 17.49 hours per car 4.18 $210303 4.19 a. $4.14 billion US b.$64150 US c. $0.0000615 billion US = $61500 US per employee 4.20 a. $731.75 b. $746 c. $985 d. $2063 $696 e. 82% 2 4.21 a. 3.333 b. 56 c. 1.5 d. due to the presence of outlier e. not enough information f. 5.789 4.22 a. 110.286=110 Yes b. 258 c. 378.274 , No, standard deviation is always positive 4.23 $10.61 4.24 $2733.295 thousand 4.25 $319 4.26 $1966.97 4.27 0.919 hour 4.28 $3.41 billion 4.29 mean=1.9 baskets per customers , Standard deviation = 0.702 basket per customer 3 4.30 For both wheat and barley, the revenue is relatively more variable than the volume. 4.31 a. 7091 square feet per store b. $3.945 million per store 4.32 x =$18.99 per hour, s =$2.90 per hour 4.33 Gross domestic product is more variable 4.34 a. μ = 6 b. σ = 3.066 μ = 6 4.35 a. b. σ = 1.673 4.37. a. 68% b. 95% c. Not calculable, 75%, 88.89% d. μ − 4σ to μ + 4σor –2.8 to 19.2 4.45 a. 4, 9,5 b. 3, 4,7, 9, 12 4.47 a. –6.5, 8, 14.5 b. –8, -6.5, 7, 8, 9 4 4.61 41.581 years = 41.6 years 4.62 $1370 x 4.63 = 28.406 patients/bed = 28 patients/bed  x = 27.5 patients/bed = 28 patients/bed s = 8.843 patients/bed = 9 patients/bed 4.64 a. $6.67 b.$123.75 , $21.43 c. $62.27 ∑ people 2(25) + 4(13) + 6(5) x = ∑ rooms = 25 +13 + 5 =3.1 people per roo3=people per room s = 1.4 people per room Calculator List 1 : 2 4 6 List 2 : 213 5 5 4.65 Ryerson x R =79.7 sR = 5.79 Brock xB = 79.4 sB = 7.10 x s Queen’s Q = 88.9 Q = 5.36 a. xR≈ x B , R < sB b. xQ> xR , s
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