If the Age Distribution of Customers at a Major Retail

question 6

Multiple Choice

If the age distribution of customers at a major retail chain is thought to be bell-shaped with a mean equal to 43 years and a standard deviation equal to 7 years, the percentage of customers between the ages of 29 and 57 years is:

• A) approximately 81.5.
• B) approximately 68.
• C) at least 75.
• D) approximately 95.

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