Healthy adults need at least 7 hours of sleep a night. (Teens need at least 9 hours.) A survey of 74,571 Americans 18 and older found that 35.3% reported sleeping less than 7 hours per night on average. People who reported sleeping less than 7 hours were more likely to report unintentionally falling asleep during the day at least once in the preceding 30 days (46.2% versus 33.2%). They were more likely to report nodding off or falling asleep while driving in the preceding 30 days (7.3% versus 3.0%). They also were more likely to report snoring (51.4% versus 46.0%). (Source: CDC Morbidity and Mortality Weekly Report, March 4, 2011, www.cdc.gov/mmwr/preview/mmwrhtml/mm6008a2.htm?s_cid=mm6008a2_w)
Healthy adults need at least 7 hours of sleep a night. (Teens need at least 9 hours.) A survey of 74,571 Americans 18 and older found that 35.3% reported sleeping less than 7 hours per night on average. People who reported sleeping less than 7 hours were more likely to report unintentionally falling asleep during the day at least once in the preceding 30 days (46.2% versus 33.2%). They were more likely to report nodding off or falling asleep while driving in the preceding 30 days (7.3% versus 3.0%). They also were more likely to report snoring (51.4% versus 46.0%). (Source: CDC Morbidity and Mortality Weekly Report, March 4, 2011, www.cdc.gov/mmwr/preview/mmwrhtml/mm6008a2.htm?s_cid=mm6008a2_w)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
![Healthy adults need at least 7 hours of sleep a night. (Teens need at least
9 hours.) A survey of 74,571 Americans 18 and older found that 35.3% reported
sleeping less than 7 hours per night on average. People who reported sleeping
less than 7 hours were more likely to report unintentionally falling asleep
during the day at least once in the preceding 30 days (46.2% versus 33.2%).
They were more likely to report nodding off or falling asleep while driving in
the preceding 30 days (7.3% versus 3.0%). They also were more likely to report
snoring (51.4% versus 46.0%). (Source: CDC Morbidity and Mortality Weekly Report, March 4, 2011,
www.cdc.gov/mmwr/preview/mmwrhtml/mm6008a2.htm?s_cid=mm6008a2_w)
a. Make a two-way frequency table, with one column for those who get at least
7 hours of sleep and one for those who do not. The rows will represent the
number in each group who did and did not report snoring.
b. What percentage of all of the Americans surveyed snore?
c. What is the relative risk of nodding off or falling asleep while driving in
the preceding 30 days for the two groups? Use this ratio in a sentence that
explains what it means.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F818e2187-d92f-4dcd-a2a4-628a60c1b962%2Fa84787e9-a6f9-4b51-bdcc-0588c6119d16%2Flhua1s5_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Healthy adults need at least 7 hours of sleep a night. (Teens need at least
9 hours.) A survey of 74,571 Americans 18 and older found that 35.3% reported
sleeping less than 7 hours per night on average. People who reported sleeping
less than 7 hours were more likely to report unintentionally falling asleep
during the day at least once in the preceding 30 days (46.2% versus 33.2%).
They were more likely to report nodding off or falling asleep while driving in
the preceding 30 days (7.3% versus 3.0%). They also were more likely to report
snoring (51.4% versus 46.0%). (Source: CDC Morbidity and Mortality Weekly Report, March 4, 2011,
www.cdc.gov/mmwr/preview/mmwrhtml/mm6008a2.htm?s_cid=mm6008a2_w)
a. Make a two-way frequency table, with one column for those who get at least
7 hours of sleep and one for those who do not. The rows will represent the
number in each group who did and did not report snoring.
b. What percentage of all of the Americans surveyed snore?
c. What is the relative risk of nodding off or falling asleep while driving in
the preceding 30 days for the two groups? Use this ratio in a sentence that
explains what it means.
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