E270 HW1 - 1) A random sample of size 5 yields the...

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A random sample of size 5 yields the fol owing data: 10 20 12 17 16 The mean is: a) 20 b) 20 c) 15 d) 15 2) Treat the set below as population data: 10 20 21 17 16 12 The mean is: a) x = ̄ 14 b) μ = 14 c) x = ̄ 16 d) μ = 16 3) 39 43 39 40 44 29 52 44 31 35 The mean time is: a) x = ̄ 39.6 b) μ = 39.6 c) x = ̄ 41.4 d) μ = 41.4 In the previous question, the sum of squared deviations is _____ minutes. a) 406.4 b) 408.4 c) 410.4 d) 412.4 In the previous question, the standard deviation of times is _____ minutes. a) s = 6.422 b) σ = 6.422 c) s = 6.769 d) σ = 6.769 The fol owing data represent the calories of 16-ounce various iced cof ee drinks . Dunkin Donuts Iced Mocha Swirl lat e 240 Starbucks Cof ee Frappuccino blended cof ee 260 Dunkin Donuts Cof ee Coolat a 350 Starbucks Iced Cof ee Mocha Expresso 350 Starbucks Mocha Frappuccino blended cof ee - Starbucks Chocolate Brownie Frappuccino blended cof ee 510 Starbucks Chocolate Frappuccino Blended Crème 530 a) 350 b) 380 c) 400 d) 420 46.6 44.2 44.6 47.1 45.9 45.4 46.6 45.7 46.5 46.4 47.3 48.4 46.0 46.1 54.6 48.5 45.6 44.3 46.5 48.0 48.5 46.1 46.2 48.6 49.9 54.2 44.8 46.1 52.0 51.9 What is the mean salary? a) x = ̄ 47.4 b) μ = 47.4 c) x = ̄ 48.1 d) μ = 48.1 Annual Salary Frequency $105,000 2 $92,000 3 $81,000 5 $64,000 8 $45,000 18 $38,000 4 The sample mean salary is: a) x = ̄ $66,000 b) x = ̄ $59,125 c) x = ̄ $54,800 d) x = ̄ $51,200 Dividend Amount Company Yield Invested ($1,000) Apple Computer 1.78 50 Chevron Corp. 3.82 35 Eastman Kodak
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