For the normal distribution described in Exercise 7.12, what tax preparation fee would have been exceeded by

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For the normal distribution described in Exercise 7.12, what tax preparation fee would have been exceeded by 90% of the tax preparation customers?
In exercise
Assuming a normal distribution and a standard deviation of σ = $20, what proportion of H&R Block’s tax preparation fees were Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
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