31. Suppose that weekly incomes of migrant workers in California have a mean of $250 and a...
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31. Suppose that weekly incomes of migrant workers in California have a mean of $250 and a standard deviation of $75.
a) If the distribution is normal, find the probability that a migrant worker has income over $300.
b) For a random sample of nine inigrant workers. report the sampling distribution of the sample mean income. Find the probability that the sample mean exceeds $300.
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Related Book For
Statistical Methods For The Social Sciences
ISBN: 9780135265260
3rd Edition
Authors: Alan Agresti, Barbara Finlay
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