A normal distribution has a mean equal to 48. What is the standard deviation of this normal distribution if 2.5% of the proportion under the curve lies to the right of x = 61.72? (Round your answer to two decimal places.)
according tho the problem:-
[ in any blank cell of excel type =NORMSINV(0.975).....then press enter ]
the standard deviation of this normal distribution = 7.00
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