Determine the margin of error for a 95% confidence interval to estimate the population mean when s = 40 for the sample sizes below. a) n = 15 b) n = 35 c) n = 48 a) The margin of error for a 95% confidence interval when n = 15 is (Round to two decimal places as needed.) b) The margin of error for a 95% confidence interval when n = 35 is (Round to two decimal places as needed.) c) The margin of error for a 95% confidence interval when n = 48 is (Round to two decimal places as needed.)
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The formula for margin of error is: Margin of error = z* (standard deviation / square root of sample size) where z* is the z-score for the desired level of confidence (in this case, 95%). Show more…
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