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The National Sporting Goods Association (NSGA) conducted a survey of the ages of individuals that purchased...

The National Sporting Goods Association (NSGA) conducted a survey of the ages of individuals that purchased skateboarding footwear. The ages of this survey are summarized in the following percent frequency distribution. Assume the survey was based on a sample of 200 individuals/

Age of User

 Percent Frequency
Under 14 years old 37
14 to 17 years old 31
18 to 24 years old 17
25 to 34 years old 5
35 to 44 years old 5
45 to 64 years old 5

Calculate the mean and the standard deviation of the age of individuals that purchased skateboarding shoes. Use 10 as the midpoint of the first class. (Do not round intermediate calculations. Round your answers to 2 decimal places.

Math   Statistics-And-Probability   
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