In Exercise 6.14, what score would be equal to or greater than 75% of the reaction times

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In Exercise 6.14, what score would be equal to or greater than 75% of the reaction times if this distribution were normal. What score actually has 75% of the observations below it?
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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