Jon S. answered • 07/31/21
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P(x < 78) = P(z < (78 - mean)/SD) = P( z < (78 - 80)/4) = P(z < -0.5) = 0.3085
Ken W.
asked • 07/30/21indicated probability
Assume the random variable x is normally distributed with mean
μ=80
and standard deviation
σ=4.
Find the indicated probability.
P(x<78)
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