Chels R.

# need the lower and upper endpoint

An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in California.  Suppose that the mean income is found to be  $24.4 for a random sample of 748 people. Assume the population standard deviation is known to be$10.6.  Construct the  85% confidence interval for the mean per capita income in thousands of dollars.

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