SOLUTION: a manufacturer offers a warranty on a new line of cell phones. If the average warranty offered is 48 months, with a standard deviation of 12 months, what is the probability that it

Question 1085642: a manufacturer offers a warranty on a new line of cell phones. If the average warranty offered is 48 months, with a standard deviation of 12 months, what is the probability that it will break before 24 months? Assume a normal distribution
Answer by mathmate(429) (Show Source): You can put this solution on YOUR website!
Question:
a manufacturer offers a warranty on a new line of cell phones. If the average warranty offered is 48 months, with a standard deviation of 12 months, what is the probability that it will break before 24 months? Assume a normal distribution

We are given that the distribution is normal, with
mean=mu=48
standard deviation=sigma=12
and
P(x therefore
P(x<24)=Z(<(24-48)/12)=Z(<-2)=0.02275 (from normal probability tables)

Hence
probability that the cell phone will break before 24 months is 0.02275.
RELATED QUESTIONS
Please help with this I am struggling, Research shows the average cell phone will be... (answered by solver91311,ewatrrr)

A store offers extended warranty on refrigerators for $75. If the average repair cost... (answered by ewatrrr)

11. An automobile battery manufacture offers an 18 month warranty on its car batteries.... (answered by stanbon)

A smart phone manufacturer is interested in constructing a 95% confidence interval for... (answered by Boreal)

The warranty on a car battery is 30 months. If the breakdown times of this battery are... (answered by Theo)

In establishing warranties on HDTV sets, the manufacturer wants to set the limits so that (answered by gonzo)

Here is my question. I am totally lost in this class I am taking. Your help is greatly... (answered by stanbon)

60. In establishing warranties on HDTV sets, the manufacturer wants to set the limits so... (answered by stanbon)

In establishing warranties on HDTV sets, the manufacturer wants to set the limits so that (answered by stanbon)