Answered: Losing sleep An article entitled “TV…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Losing sleep An article entitled “TV Before Bed May Rob
Teens of Sleep” reported on a study published online in
Pediatrics in January of 2013. The study found that students
who watch TV before bedtime tend to go to sleep later than
those who engaged in nonscreen sedentary activities before
bed. Researchers contacted a nationally representative

cross-sectional sample of teens in New Zealand, interview-
ing participants in person and following up with phone

interviews, to look for a relationship between before-bed
activities and the length of time before kids go to sleep.
a) Is this an experiment? Explain why or why not.
b) Researchers cautioned that “causality could not be
inferred from their cross-sectional study.” Explain why
this is the case.
c) Comment on the title of the article in light of your
answer to part b.

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