# Question

A certain brand of refrigerators has a length of life that is normally distributed with a mean and a standard deviation of 15 years and 2 years, respectively. In addition to providing the answer, state the relevant Excel commands.

a. What is the probability a refrigerator will last less than 6.5 years?

b. What is the probability that a refrigerator will last more than 23 years?

c. What length of life should the retailer advertise for these refrigerators so that only 3% of the refrigerators fail before the advertised length of life?

a. What is the probability a refrigerator will last less than 6.5 years?

b. What is the probability that a refrigerator will last more than 23 years?

c. What length of life should the retailer advertise for these refrigerators so that only 3% of the refrigerators fail before the advertised length of life?

## Answer to relevant Questions

Assume a Poisson random variable has a mean of 6 successes over a 120-minute period.a. Find the mean of the random variable, defined by the time between successes.b. What is the rate parameter of the appropriate exponential ...Let X be exponentially distributed with µ = 1.25. In addition to providing the answer, state the relevant Excel commands.a. P(XMotorists arrive at a Gulf station at the rate of two per minute during morning hours. Assume that the arrival of motorists at the station follows a Poisson distribution. In addition to providing the answer, state the ...A new water filtration system is sold with a 10-year warranty that includes all parts and repairs. Suppose the life of this water filtration system is normally distributed with mean and standard deviation of 16 and 5 years, ...On average, a certain kind of kitchen appliance requires repairs once every four years. Assume that the times between repairs are exponentially distributed. In addition to providing the answer, state the relevant Excel ...Post your question

0