The Mean Life of a Pair of Shoes Is 40

question 83

Multiple Choice

The mean life of a pair of shoes is 40 months with a standard deviation of 8 months. If the life of the shoes is normally distributed, how many pairs of shoes out of one million will need replacement before 36 months?

• A) 500,073
• B) 808,573
• C) 191,537
• D) 308,537

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