Hatice B. answered • 10/11/21
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About 68% of the x values lie between –1σ and +1σ of the mean µ (within one standard deviation of the mean).
this means;
P (130<x<170) = 0.68
so; P (x>125) > 0.5
if you want to calculate probability, I can provide the solution
Hatice B.
In a normally distributed data set, you can find the probability of a particular event as long as you have the mean and standard deviation. calculate the z-score using the formula z = (x – μ )/σ z = (125-150)/20 = - 1.25 P(x>125) = P( z>-1.25) =1-P(z<-1.25) Read the left area from the z and probability table And subtract it from 1 P(z>-1.25)=1-0.10565 =0.89435 or 89.4 %
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10/11/21
Ernie T.
Yes please, Just need to see the steps on how to solve this problem10/11/21