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 respon-
dents 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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