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Mathematics, 30.08.2019 18:40 brydenskl814

The average cost of an irs form 1040 tax filing at thetis tax service is $150.00. assuming a normal distribution, if 90 percent of the filings cost less than $172.00, what is the standard deviation? hint: use excel or appendix c-2 to find the z-score. (

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The average cost of an irs form 1040 tax filing at thetis tax service is $150.00. assuming a normal...
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