Question: Microwave Oven Lines A survey found that people keep their microwave ovens an average of 3.2 years. The standard deviation is 0.56 year. If a person decides to buy a new microwave oven, find the probability that he or she owned the old oven for the following amount of time. Assume the variable is normally distributed.

1. Less than 1.5 years
2. Between 2 and 3 years
3. More than 3.2 years
4. What percent of microwave ovens would be replaced if a warranty of 18 months were given?

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