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Statistics / Mathematical Statistics with Applications 7 / Chapter 7 / Problem 45E

Mathematical Statistics with Applications | 7th Edition | ISBN: 9780495110811 | Authors: Dennis Wackerly; William Mendenhall; Richard L. Scheaffer

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Workers employed in a large service industry have an

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QUESTION:

Problem 45E

Workers employed in a large service industry have an average wage of $7.00 per hour with a standard deviation of $.50. The industry has 64 workers of a certain ethnic group. These workers have an average wage of $6.90 per hour. Is it reasonable to assume that the wage rate of the ethnic group is equivalent to that of a random sample of workers from those employed in the service industry? [Hint: Calculate the probability of obtaining a sample mean less than or equal to $6.90 per hour.]

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QUESTION:

Problem 45E

Workers employed in a large service industry have an average wage of $7.00 per hour with a standard deviation of $.50. The industry has 64 workers of a certain ethnic group. These workers have an average wage of $6.90 per hour. Is it reasonable to assume that the wage rate of the ethnic group is equivalent to that of a random sample of workers from those employed in the service industry? [Hint: Calculate the probability of obtaining a sample mean less than or equal to $6.90 per hour.]

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