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A random sample of 40 taxpayers with adjusted gross incomes of between $100,000 and $200,000 was drawn. These taxpayers claimed an average of 9,922 in medical expenses for the year. Assume the population standard deviation for these deductions was $2,400. Construct confidence intervals to estimate the average deduction for the population with the following levels of significance.
A) 2%
B) 5%
C) 10%
Refer to the sensitivity information for the Kelson Sporting Equipment problem in Figure 8.14 (see Problem 5).
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What percentage of items will weigh between 6.4 and 8.9 ounces?
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