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Previous 21 22 23 24 25 26 27 28 2930 Next Question 22 of 41 (1 point) 6.2 Section Exercise 18 The average charitable contribution itemized per income tax return in Pennsylvania is S792. Suppose that the distribution of contributions is normal with a standard deviation of $103. Find the limits for the middle 74% of contributions. Round-value calculations and final answers to 2 decimal places. Source: IRS, Statistics of Income Bulletin. The lower and upper limits for the middle 74% of contributions are respective ly ] and

Explanation / Answer

for middle 74% values ; critical value of z =1.13

therefore corresponding lower llimit =mean -z*Std deviaiton =675.98

upper llimit =mean +z*Std deviaiton =908.02

please revert as z values taken with 2 decimals ; answer may differ

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