According to a census bureau,12.5% of the population in a certain country changed addresses from 2008 to 2009. In 2010,14 out of a random sample of 200 citizens of this country said they changed addresses during the previous year (in 2009). Complete parts a through c below.
confidence interval to estimate the actual proportion of people who changed addresses from 2009 to 2010.
A) 99% confidence interval to estimate the actual proportion has a lower limit of _ and an upper limit of _.
B) What is the margin of error for this sample?
The margin of error is
Is there any evidence that this proportion has changed since 2009 based on this sample?
Because the confidence interval found in part a
does not include
the reported proportion from 2009, this sample
does not provide
evidence that this proportion has changed since then.
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