Turner Johnston

Mathematics

14 July, 07:44

A manufacturer finds that the life expectancy of its best selling model of dishwashers is 11 years and the standard deviation is one year. The lifespans are approximately normally distributed. What percent of dishwasher models skill last from 9-13 years? A. About 68%. B. about 95%. C. About 34 percent. D. About 47.5 percent

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