Week 1 Assignment Ch 3,5,6,7

# Week 1 Assignment Ch 3,5,6,7 - Minimum Maximum Q1 Q3 Price...

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Charles Blackstone QNT/561 Professor Saeed Tabriz Week1 Assignment 3/28/2011

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Chapter 3 : 80. a. The times are a population because all tables for that night are included. b. The mean is 40.84, found by 1021/25. The median is 39. c. The range is 44, found by 67 – 23. The standard deviation is 14.55, found by the square root of 5291.4/25. 82. Class M f f ( M ) M – μ ( M – )^2 f ( M – )^2 80 up to 100 90 3 270 –51.2 2621.44 7864.3 100 up to 120 11 0 8 880 –31.2 973.44 7787.5 120 up to 140 13 0 1 2 156 0 –11.2 125.44 1505.3 140 up to 160 15 0 1 6 240 0 8.8 77.44 1239.0 160 up to 180 17 0 7 119 0 28.8 829.44 5806.1 180 up to 200 19 0 4 760 48.8 2381.44 9525.8 706 0 33728 a) The mean is \$141.20, found by 7060/50. b) The standard deviation is \$26.24, found by the square root of 33728/49. c) The empirical rule says that 95 percent of the costs are between \$88.72 and 193.68, found by 141.20 ± 2(26.24). 87. a. 1. A software package gave the output: Descriptive Statistics: Price Variable N Mean Median TrMean StDev SE Mean Price 105 221.10 213.60 220.00 47.11 4.60 Variable
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Unformatted text preview: Minimum Maximum Q1 Q3 Price 125.00 345.30 186.85 251.85 2. The distribution is symmetric about \$220,000 with most of the prices less than \$30,000 away from the center. b. 1. A software package gave the output: Descriptive Statistics: Size Variable N Mean Median TrMean StDev SE Mean Size 105 2223.8 2200.0 2218.9 248.7 24.3 Variable Minimum Maximum Q1 Q3 Size 1600.0 2900.0 2100.0 2400.0 Chapter 5: 34. 0.3636 36. 0.8571 38. 0.625 Chapter 6 45. a) 0.0010.001 62. a) = 3, probability = 0.0498 b) 0.5768, found by 1 – (0.0498 + 0.1494 + 0.2240) Chapter 7 42. a) -1.5, found by (29-32)/2 b) 0.7745, found by 0.4332 + 0.3413 c) 0.0495, found by 0.5000 -0.4505 d) 35.3, found by 32 + 1.65(2) 45. a) 0.3015, found by 0.5000 -0.1985 b) 0.2579, found by 0.4564 -0.1985 c) 0.0011, found by 0.5000 -0.4989 d) Greater than \$1818, found by 1280 + 1.28(420)...
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Week 1 Assignment Ch 3,5,6,7 - Minimum Maximum Q1 Q3 Price...

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