A survey is done linking the number of concussions a season to hockey players. The NHL consists of 700 players and we wish to have a confidence level of 0.95 (corresponding to a critical value of Z2α=1.96). Let us assume that the point estimate will be p^=0.0125 for every sample taken.
What is the margin of error, if 350 players are sampled?
Margin of error
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