SOLUTION: A smart TV uses 120 watts of electricity per hour based on 7 hours of use per day. Assume the amount of electricity used measured is approximately normally distributed and the sta

Question 1174439: A smart TV uses 120 watts of electricity per hour based on 7 hours of use per day. Assume
the amount of electricity used measured is approximately normally distributed and the standard deviation is 8. If 350 smart TV's are taken from the production line and tested, approximately how many will use more than 130 watts of power? (If you get a non-integer, round up and write that as the answer!)
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!


Hi
Normal Distribution:   μ = 120   σ = 8 
sample of 35
P(x>130) = P(x ≤ 130) = normalcdf(-9999, 130, 8, 120) = .89
  .89(35) = 31,  35-31 = 5  will use more than 130 watts of power
Wish You the Best in your Studies.

RELATED QUESTIONS
A smart TV uses 120 watts of electricity per hour based on 7 hours of use per day. Assume (answered by Alan3354)

In apartment 5C, lamps, an air conditioner, and a television set are all operating at the (answered by Earlsdon)

In 2009, the average person in China sed about 28.18 kilowatt-hours of electricity per... (answered by Alan3354)

In 2010, the average person in India used about 1.71 kilowatt-hours of electricity per... (answered by Alan3354)

In 2010, the average person in Australia used about 28.18 kilowatt-hours of electricity... (answered by ikleyn)

In a certain city, electricity costs $0.10 per kW�h. What is the annual cost for... (answered by ikleyn,MathTherapy)

during one month a homeowner used 400 units of electricity and 120 units of gas for a... (answered by checkley79)

[ Wisconsin public service applies the following charges for customers who use... (answered by TimothyLamb)

Compare the costs per unit of energy for electricity and gasoline. Assume $0.06 per kWh... (answered by ikleyn)