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Business, 13.08.2019 03:10 rubal6

The mean annual income of certified welders is normally distributed with a mean of $50,000 and a population standard deviation of $2,000. the ship building association wishes to find out whether their welders earn more or less than $50,000 annually. the alternate hypothesis is that the mean is not $50,000. if the level of significance is .10, what is the critical value

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