In: Advanced Math
On 5/17/2020, a random sample of 1007 U.S. households finds that Trump has a 49% approval rating.
a) Use the 2SD method to find a 95% confidence interval estimate of the proportion of all U.S. households that approve of Trump on 5/17/2020. Show all work/steps to get the 2SD estimate. Round the margin of error to three decimal places. Work and Answer:
b) Use your answer from part (a) to fill in the red spaces below in order to write the results of the poll in these two notations:
According to the poll, on 5/17/2020, Trump has an approval rating of 49% ± _________%
According to the poll, on 5/17/2020, Trump’s approval rating was between ______% and ______%
c) If we were to use this same sample information to find a 90% confidence interval estimate instead of a 95% confidence interval estimate, then would our new 90% confidence interval be wider, or would it be narrower than the 95% estimate? Work and Answer: