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A random sample of 42 taxpayers claimed an average of ​$9,857 in medical expenses for the...

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Statistics

A random sample of 42 taxpayers claimed an average of ​$9,857 inmedical expenses for the year. Assume the population standarddeviation for these deductions was ​$2,409. Construct confidenceintervals to estimate the average deduction for the population withthe levels of significance shown below.

a)1%

b)2%

c)20%

Answer & Explanation Solved by verified expert
4.1 Ratings (543 Votes)
1 99 Confidence Interval X Z 2 n Z2 Z 001 2 2576 9857 2576 240942 Lower Limit 9857 2576 240942 Lower Limit 889946 Upper    See Answer
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