Questions 15 - The Internal Revenue Service (IRS) determines whichincome tax returns to audit by looking at, among otherthings, whether there are any unusual deductions claimedon the return. Last year, charitable deductions for a familyof four earning between andaveraged , with a standard deviation of .The IRS wishes to know whether the standard deviationthis year is still around . To determine this,income tax returns for families of four earning between and were randomly selected from thisyear's tax filings. The charitable deductions claimed on thereturns are summarized in the following histogram:
Attachment:- worksheet_9 (2).pdf