QNT275-During elections the news may report that Candidate

QNT275-During elections the news may report that Candidate

Subject: Mathematics    / Statistics
Question

During elections the news may report that Candidate C is winning with 52% of the vote but a 3% margin of error. What sample size is needed for a 3% margin of error?

Sample-size and margin-of-error

z = normal probability

p = probability or ratio from a vote or poll

n = sample size

e = margin of error = z ? ( p (1 – p) / n )

Assignment:

Calculate n for e=.03.

Reply to this topic with your calculations.