The lower limit of a confidence interval at the 95 level of confidence for the...
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The lower limit of a confidence interval at the 95 level of confidence for the population proportion when the sample size of 100 had 30 successes is a 0 3898 b 0 2102 c 0 2959 d 0 3041 5 A 99 confidence interval estimate for a population mean u is determined to be 85 58 to 96 62 If the confidence level is reduced to 90 the confidence interval for 4 a becomes wider c becomes narrower 6 b remains the same d None of these From a sample of 200 items 12 items are defective The point estimate of the population proportion p defective will be a 12 b 0 06 c 16 67 d 0 12 7 In order to estimate the average number of miles that students who live off campus commute to classes every day the following statistics were given n 50 x 5 21 and s 2 48 The point estimate of the true population mean is a 1 96 b 2 10 c 5 21 d 7 07
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