e71_hw1 - Stats for Strategy Whitten HW 1 Solution I Text...

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Stats for Strategy Whitten HW 1 Solution I. Text Exercises 3.15 (a) Population = all eating and drinking establishments in the city (b) Population = all constituents in the Congressperson’s district. (c) Population = all auto insurance claims filed during that month 3.58 (a) The number 43 is a sample statistic . Converting to a proportion, b p = 0.43 . (b) The number 52% is a population parameter : p = 0.52 . 3.59 (a) p = 0.68 is a population proportion (parameter.) (b) b p = 0.73 is a sample proportion (statistic.) 3.66 The figure 6.2% is a statistic : b p = 0.062 . 3.67 (a) The number 2.503 is a population parameter (mean): μ = 2.503 . (b) The number 2.515 is a sample statistic (mean): ¯ x = 2.515 . 3.65 (a) Population = all people who live in Ontario. Sample = the 61,239 people interviewed. (b) Assuming that the people interviewed were randomly sampled, the statistics b p 1 = 0.76 and b p 2 = 0.86 are very likely to be close (small margin of error) to the parameters p 1 = proportion of males in Ontario who visited a general practitioner at least once in the past year p 2
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