Question: The Advertiser vote line Saturday July 24th asked the question “Should parents teach their children to drive“. The results were published on Wednesday July 28th as 11 YES votes and

15 NO votes.

a. Use these data to construct an 80% interval estimate (using the usual formula with

Z) . [2 marks] b. Interpret the interval from part a) above. Also, explain what confidence means (in the statistical sense, as applied to interval estimation) [3 marks]

c. Give 3 reasons why this interval is of little use. [3 marks]