SOLUTION: A TV manufacturer knows that their TV's have a normally distributed lifespan, with a mean of 7.5 years, and standard deviation of 1.8 years.
If a TV is picked at random, 1% of t
Algebra ->
Probability-and-statistics
-> SOLUTION: A TV manufacturer knows that their TV's have a normally distributed lifespan, with a mean of 7.5 years, and standard deviation of 1.8 years.
If a TV is picked at random, 1% of t
Log On
Question 1157425: A TV manufacturer knows that their TV's have a normally distributed lifespan, with a mean of 7.5 years, and standard deviation of 1.8 years.
If a TV is picked at random, 1% of the time its life will be less than how many years?
Give your answer to one decimal place. Answer by VFBundy(438) (Show Source):
You can put this solution on YOUR website! Go to a z-table and find which z-score corresponds to a value of 0.01. The closest z-score is -2.33: = -2.33 = -2.33
x - 7.5 = -2.33(1.8)
x - 7.5 = -4.194
x = 3.306
