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The IRS would like to find out the average time it takes a taxpayer to complete...

The IRS would like to find out the average time it takes a taxpayer to complete a 1040 Individual Tax Return. The IRS has taken a sample of 25 taxpayers and found top enclose X = 16.3 hours with s = 11.2. The values of the 95% confident interval are (report answers rounded to two decimal places):

Lower Limit

Upper Limit

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