After surveying 995 adults, 81.5% of whom were over 30, the National Sleep Foundation reported that 36.8%

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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 30 or less and did not snore?
b) Is snoring independent of age? Explain.
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Stats Data And Models

ISBN: 662

4th Edition

Authors: Richard D. De Veaux, Paul D. Velleman, David E. Bock

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