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A random sample of 44 taxpayers claimed an average of ​$9,700 in medical expenses for the...

A random sample of 44 taxpayers claimed an average of ​$9,700 in medical expenses for the year. Assume the population standard deviation for these deductions was ​$2,379. Construct confidence intervals to estimate the average deduction for the population with the levels of significance shown below.

a.5%

b.10%

c.20%

a. The confidence interval with a 5% level of significance has a lower limit of ​$ nothing and an upper limit of ​$ nothing .

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