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  • 29-01-2024
  • Mathematics
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A manufacturer that finds that the life expectancy of its best-selling refrigerator is 15 years and the standard deviation is 1.5 years. The lifespans are approximately normally distributed. What percent of refrigerator models will last from 13 to 17 years?
a) 68%
b) 95%
c) 99.7%
d) 84%

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