Question #347186

If the average time spent studying is 10 hours and the standard deviation is 4 hours, what it the probability that a student will spend more than 13 hours studying?


1
Expert's answer
2022-06-02T18:19:35-0400
P(X>13)=1P(Z13104)P(X>13)=1-P(Z\le\dfrac{13-10}{4})

=1P(Z0.75)0.2266=1-P(Z\le0.75)\approx0.2266


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