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A random sample of 81 observations yielded a mean of JT: 248.25 and a standard viation of s = 4.8. The point estimate for the

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A random sample of 81 observations yielded a mean of JT: 248.25 and a standard viation of s = 4.8. The point estimate for the population mean ,5! Construct a 95% condence interval for the population mean ,u . Construct a 38% condence interval for the population mean tr

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