Mathematics, 21.06.2021 16:30 rachelsweeney10
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
Under 14 years old 34Â Â Â Â Â Â Â Â Â Â
14 to 17 years old 39Â Â Â Â Â Â Â Â Â Â
18 to 24 years old 17Â Â Â Â Â Â Â Â Â Â
25 to 34 years old 4 Â Â Â Â Â Â Â Â Â
35 to 44 years old 3 Â Â Â Â Â Â Â Â Â
45 to 64 years old 3
Required:
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.
Answers: 3
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