SOLUTION: The lifetime of a particular type of light-bulb has been shown to follow a Normal distribution with mean lifetime of 1000 hours and standard deviation of 125 hours. Three bulbs ar

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Question 1177285: The lifetime of a particular type of light-bulb has been shown to follow a Normal distribution
with mean lifetime of 1000 hours and standard deviation of 125 hours. Three bulbs are
found to last 1250, 980 and 1150 hours. Convert these values to standardized normal
scores
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
Normal Distribution:    μ =1000   σ = 125    
z+=blue+%28x+-+mu%29%2Fblue%28sigma%29

 z(1250) = (250)/125
 z(980) = -20/125
 z(1150) =  150/125

Will leave the final answer Up to You as per assignment directives

Wish You the Best in your Studies.