A Political Scientist Wants to Prove That a Candidate Is

Multiple Choice

A political scientist wants to prove that a candidate is currently carrying more than 60% of the vote in the riding.She has her assistants randomly sample 200 eligible voters in the riding by telephone and only 90 declare that they support her candidate.The observed z value for this problem is ___.

A) -4.33
B) 4.33
C) 0.45
D) -.31
E) 2.33