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Construct a 90% confidence interval to estimate the population mean when x =62 and s​ =13.5...

Construct a 90% confidence interval to estimate the population mean when x =62 and s​ =13.5 for the sample sizes below.

​a)

n=20

​b)

n=40

​c)

n=60

​a) The 90% confidence interval for the population mean when n=20 is from a lower limit of nothing to an upper limit of nothing. ​(Round to two decimal places as​ needed.)

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