In a survey about an upcoming election, 600 people were randomly sampled and 168 said they preferred the Democratic candidate over all others.Based on this sample, compute a 95% confidence interval and then use it to estimate the proportion of the voting population that prefers the Democratic candidate over all others. Your confidence interval should include two decimal places and your estimate should be in complete sentence form.

• Use z=1.645
• for a 90% confidence interval
• Usez z=1.96
• for a 95% confidence interval
• z=2.576
• for a 99% confidence interval

In the box below enter and label each of the following (you do NOT need to enter your calculations in the box but be sure they are clearly written on your paper that you will submit after the exam):

A) Write confidence interval in BOTHintervalform AND inpoint estimate +/- margin of errorform.Round values to two decimal places.

B) Interpret your confidence interval in a complete sentence. Be sure to include appropriate numbers and the context of the problem.