SOLUTION: A statistics lecturer has found that the grades on the final exam are normally distributed with a mean of 64 and a standard deviation of 11. question: if the passing grade is 50,

Question 489677: A statistics lecturer has found that the grades on the final exam are normally distributed with a mean of 64 and a standard deviation of 11.
question: if the passing grade is 50, what proportion of the class will fail?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A statistics lecturer has found that the grades on the final exam are normally distributed with a mean of 64 and a standard deviation of 11.
question: if the passing grade is 50, what proportion of the class will fail?
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z(50) = (50-64)/11 = -14/11
P(x < 50) = P(z < -14/11) = 0.1016
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Cheers,
Stan H.
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