The Florida Department of Transportation (FDOT) would like to estimate the average speed of vehicles on 95. The mean speed , in miles per hour , of a random sample of vehicles was found to be 73 miles per hour. The standard deviation of the speeds of all vehicles on 1 - 95 is known to be 15 miles per hour . Find three different confidence intervals one with sample size 103, one with sample size 231, and one with sample size 370. Assume that the mean of each sample is 73 miles per hour . Notice how the sample size affects the margin of error and the width of the interval. Report confidence interval solutions using interval notation . Round solutions to two decimal places, if necessa
The Florida Department of Transportation (FDOT) would like to estimate the average speed of vehicles on 95. The mean speed , in miles per hour , of a random sample of vehicles was found to be 73 miles per hour. The standard deviation of the speeds of all vehicles on 1 - 95 is known to be 15 miles per hour . Find three different confidence intervals one with
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