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Unformatted text preview: a.i.1.b. if shape not normal but n >_ 30 then sample likely to have shape like population and spproximately normal a.ii. Sample (has a distribution) a.iii. Sampling distribution a.iii.1. Normal. ..(mean is mu and standard erron is sigma/ square root of n) b. Proportions b.i. Population distribution b.i.1. p b.ii. Sample (has a distribution) b.ii.1. P-hat b.ii.2. As long as we expect at least 15 successes and 15 failures (np, n(1-p)) b.iii. Sampling distribution b.iii.1. Approximately normal with mean, p and standard errom, square root(p(1-p))/n)...
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- Fall '08