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the heights were recorded for a simple random sample of 270 junior. the mean of this sample was 68.5 inches. the heights are known to be normally distributed with a population standard deviation of 5.2 inches. round answers to two decimal place. (you do not need a data set for this problem.) in part (a), what is the margin of error? provide a numeric value, rounded to three decimal places.
Sagot :
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