SOLUTION: The time required to make 1100 gallons of synthetic rubber at a plant in South America in a recent year was normally distributed with a mean of 16 hours and a standard deviation of

Question 314993: The time required to make 1100 gallons of synthetic rubber at a plant in South America in a recent year was normally distributed with a mean of 16 hours and a standard deviation of 3 hours. What is the probability that it will take more than 19 hours to make 1100 gallons of synthetic rubber
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Find the z-score.

That probability value is that the process will take 19 hours or less.
To calculate for greater than 19 hours, recall that
P( <= 19)+P( > 19)=
P( > 19)=
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