Question: Sample size, n = 49; sample mean, x = 12.8 kilograms (kg); sample standard deviation, s = 2.5 kg Margins of Error and Confidence Intervals.

Sample size, n = 49; sample mean, x = 12.8 kilograms (kg); sample standard deviation, s = 2.5 kg

Margins of Error and Confidence Intervals. For Exercise, assume that population means are to be estimated from the samples described. In each case, use the sample results to approximate the margin of error and 95% confidence interval.

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