Answered: Birthweight In 2003 the Journal of the…

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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Birthweight In 2003 the Journal of the American
Medical Association reported a study examining the
possible impact of air pollution caused by the 9/11 attack

New York’s World Trade Center on the weight of
babies. Researchers found that 8% of 182 babies born to
mothers who were exposed to heavy doses of soot and
ash on September 11 were classified as having low birth
weight. Only 4% of 2300 babies born in another New
York City hospital whose mothers had not been near the
site of the disaster were similarly classified. Does this
indicate a possibility that air pollution might be linked to
a significantly higher proportion of low-weight babies?
a) Was this an experiment? Explain.

b) Test an appropriate hypothesis and state your conclu-
sion in context.

c) If you concluded there is a difference, estimate that
difference with a confidence interval and interpret that
interval in context.

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