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Mathematics, 21.03.2020 10:30, chawnholliday8673
The average cost of an IRS Form 1040 tax filing at Thetis Tax Service is $157.00. Assuming a normal distribution, if 70 percent of the filings cost less than $171.00, what is the standard deviation? Hint: Use Excel or Appendix C-2 to find the z-score. (Round your answer to 2 decimal places.) Standard deviation $
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The average cost of an IRS Form 1040 tax filing at Thetis Tax Service is $157.00. Assuming a normal...
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