SOLUTION: The time it takes to assemble an electronic component is normally distributed with a mean of 17.2 minutes and a standard deviation of 3.1 minutes. What is the probability that it w

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Question 1159006: The time it takes to assemble an electronic component is normally distributed with a mean of 17.2 minutes and a standard deviation of 3.1 minutes. What is the probability that it will take at least 20 minutes to assemble a component?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
z=(x-mean)/sd
z=(20-17.2/3.1=2.8/3.1 or z<0.90
probability is 0.8168