SOLUTION: The time, X minutes, taken by FlyFast to install a satellite may be assumed to be a normal random variable with mean 134 and standard deviation 16. Determine the time which is exce
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Question 1165430: The time, X minutes, taken by FlyFast to install a satellite may be assumed to be a normal random variable with mean 134 and standard deviation 16. Determine the time which is exceeded by 10 percent of installation.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
the 90th percentile is z=1.28
so z=(x-mean)/sd
1.28=(x-134)/16
20.48=x-134
x=154.48 minutes
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