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Height data, collected from a statistics class, has a mean,x= 68.21 inches, and a standard deviation of 4.01 inches. The sample size of the data

Height data, collected from a statistics class, has a mean,x= 68.21 inches, and a standard deviation of 4.01 inches. The sample size of the data was n = 36 . Suppose the data collected could be considered a random sample of WCU students.

Calculate the lower boundary of a 90 %confidence z-interval

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