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Unformatted text preview: ± .4 t .025 is about 2 for most df (see Table 4), is SE 2 times ??? = .4, 2 times 0.2 = .4 s best estimate is from earlier study, 1.22 cm. ≤ 0.2 , ≤ 0.2 , n = 37.2 38 plants 6.5 Validity of Estimation Methods 1. Conditions of study design – the brood/bird homework problem. Random sample of population – not biased. Independent observations. 2. Conditions for validity of confidence interval. Normal shape/sample size (Section 5.4)....
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 Spring '08
 KOSCIK
 Statistics, wider confidence interval

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