A random sample size 49 is drawn from a distribution. The sample mean is 150. Suppose the distribution has a standard deviation 50. Compute 95% confidence ibterval of mean. Suppose the distribution is 40. Compute 95% confidence interval mean. Suppose the distribution has 30. Compute 95% confidence interval mean. Compare the margin of error for all 3, as the standard deviation decreases, does the margin of error d

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