A senator wishes to estimate the proportion of United States voters who favor

abolishing the Electoral College. How large a sample is needed in order to be 90%

confident that the sample proportion will not differ from the true proportion by more

than 3%?

And rounded up we have that n=748

Step-by-step explanation:

The confidence level is 90% and the significance level would be and and the critical value for this case is:

The margin of error for the proportion interval is given by this formula:  

   (a)  

And on this case we want a margin of error of and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

  (b)  

Since we don't hace any prior info for the population proportion we can use . And replacing into equation (b) the values from part a we got:

And rounded up we have that n=748

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right

answer: 2530

hope this