Snoring after surveying 995 adults 815 of whom were over 30


Question: Snoring. After surveying 995 adults, 81.5% of whom were over 30, the National Sleep Foundation reported that 36.8% of all the adults snored. 32% of the respondents were snorers over the age of 30.

a) What percent of the respondents were under 30 and did not snore?

b) Is snoring independent of age? Explain.

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Basic Statistics: Snoring after surveying 995 adults 815 of whom were over 30
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