شباااب ,, سؤال في الاحصاء من الاختبارات القديمه
A survey found that the microwave ovens have an average life of 3 years with a standard deviation of
0.5 year. Assume the variable is normally distributed. What percent of microwave ovens would be
replaced if a warranty of 18 months were given?
A) 0.13% B) 2.28% C) 10.56% D) 0.62%
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