SOLUTION: The XYZ Company tested a new product and found its lifetime to be normally distributed, with a mean life of 146 days and a standard deviation of 19.5 days. What is the probability
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Question 316509: The XYZ Company tested a new product and found its lifetime to be normally distributed, with a mean life of 146 days and a standard deviation of 19.5 days. What is the probability that a product selected at random will last longer than 166 days?
Answer
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Find the zscore.
The probability is for
P()+P()=1
P()=1-P()
P()=1-0.84747
P()=0.15253
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