A random sample of 40 PCC students are surveyed about their commuting time. A mean of 24.5 minutes was calculated from the survey. The population standard deviation is known to be 5.8 minutes. Construct a 95% confidence interval for the average commuting time for all PCC students. Round your answer to the nearest tenth of a minute. Confidence Interval: ( , )
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The standard error is calculated by dividing the standard deviation by the square root of the sample size. In this case, the standard deviation is 5.8 minutes and the sample size is 40. Standard Error = 5.8 / √40 = 0.92 Show more…
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