A Recent Survey Found That 70% of All Adults Over

question 125

Multiple Choice

A recent survey found that 70% of all adults over 50 wear glasses for driving. In a random sample of 70 adults over 50, what is the mean and standard deviation of the number who wear glasses?
Round to the nearest hundredth when necessary.

• A)mean: 21; standard deviation: 3.83
• B)mean: 49; standard deviation: 3.83
• C)mean: 49; standard deviation: 7
• D)mean: 21; standard deviation: 7

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