In: Statistics and Probability
A dishwasher has a mean life of 10 years with an estimated
standard deviation of 1.25...
- A dishwasher has a mean life of 10 years with an estimated
standard deviation of 1.25 years ("Appliance life expectancy,"
2013). Assume the life of a dishwasher is normally
distributed.
- State the random variable.
- Find the probability that a dishwasher will last more than 15
years.
- Find the probability that a dishwasher will last less than 6
years.
- Find the probability that a dishwasher will last between 8 and
10 years.
- If you found a dishwasher that lasted less than 6 years, would
you think that you have a problem with the manufacturing
process? Why or why not?
- A manufacturer of dishwashers only wants to replace free of
charge 5% of all dishwashers. How long should the manufacturer make
the warranty period?