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Business, 19.03.2020 01:59 martina28

The average length of a flight by regional airlines in the United States has been reported as 464 miles. If a simple random sample of 30 flights by regional airlines were to have a mean of 476.9 miles and a standard deviation of 42.8 miles, if we want to test whether this would tend to cast doubt on the reported average of 464 miles, what is the calculated value of test statistic

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