SOLUTION: A 100-watt light bulb has an average brightness of 1650 lumens, with a standard deviation of 60 lumens.
a) what is the probability that the 100-watt light bulb will have a brig
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-> SOLUTION: A 100-watt light bulb has an average brightness of 1650 lumens, with a standard deviation of 60 lumens.
a) what is the probability that the 100-watt light bulb will have a brig
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Question 1161230: A 100-watt light bulb has an average brightness of 1650 lumens, with a standard deviation of 60 lumens.
a) what is the probability that the 100-watt light bulb will have a brightness of more than 1740 lumens?
b) what is the probability that the 100-watt light bulb will have a brightness of less than 1600 lumens?
c) what is the probability that 100-watt light bulb will have a brightness between 1600 and 1720 lumens? Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! this is z=(x-mean)/sd where for a z>(1740-1650)/60=1.5
probability z> 1.5 is 0.0668
<1600 is z<-50/60 for probability of 0.2023
c=0.6760
Can use the calculator here with 2 VARS normalcdf (1600,1720,1650,60) ENTER. Notice how it is ordered.
