Unformatted text preview: 2 points] Solution True. 2 SEs = 0.14. (d) 95% of the households in the city contain between 2.16 and 2.44 persons. [ 2 points] Solution False. Makes no sense there is no whole number between 2.16 and 2.44! (e) The 95% conﬁdence interval is about right because household size follows the normal curve. [ 2 points] Solution False. The histogram may not be normal. in fact it’s not, since 2 . 32 × 1 . 75 is negative. (f) The 95% conﬁdence level is about right because, with 625 draws from the box, the probability histogram fo the average of the draws follows the normal curve. [ 2 points] Solution True. The average of draws follows a normal curve. 1...
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 Spring '11
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 Math, Statistics, Topology, Normal Distribution, Probability theory, Simple random sample, Household income in the United States, average household size

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