Statistics Discussion Problem
Political polls typically
sample randomly from the U.S population to investigate the percentage of voters
who favor some candidate or issue. The number of people polled is usually on
the order of 1000. Suppose that one such poll asks voters how they feel about
the President's handling of the crisis in the financial markets. The results
show that 575 out of the 1280 people polled say they either “approve” or
“strongly approve” of the President's handling of this matter. Based on the
sample referenced above, find a 95% confidence interval estimate for the proportion
of the entire voter population who “approve” or “strongly approve” of the
President's handling of the crisis in the financial markets.
Now, here's an interesting twist. If the same sample proportion was found in a sample twice as large—that is, 1150 out of 2560—how would this affect the confidence interval? …more
Now, here's an interesting twist. If the same sample proportion was found in a sample twice as large—that is, 1150 out of 2560—how would this affect the confidence interval? …more
No comments:
Post a Comment