Unit3.chapter 7. day2.notebook
1
December 16, 2011
Daily Review / Test Prep
FourBlock
An opinion poll asks an SRS of 1500 adults,
"Do you happen to jog?" Suppose that the
proportion of people who jog is
p
= 0.15. To
estimate
p
we use the proportion
p(hat)
in the
sample who answer "YES". The statistic p hat
is a random variable the is approximately
normally distributed with mean mu = 0.15 and
standard deviation sigma = .0092
a. P(p hat) >_ 0.16
b. P(0.14_< p hat_< 0.16
c. P ( p hat = .18)
d. How would you construct a simulation you would carry out
to approximate to get an answer close to a.
Dec 1411:08 AM
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December 16, 2011
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