SOLUTION: In a survey, 74% of respondents state that they had watched more than 10 hours of television in the past.The margin of error was 4%. Determine the number of people in survey
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Question 970658: In a survey, 74% of respondents state that they had watched more than 10 hours of television in the past.The margin of error was 4%. Determine the number of people in survey Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! The margin of error is
e=z* sqrt {(p)(1-p)/n}
e^2=z^2 *p*(1-p)/n
n=z^2 p*(1-p)/e^2
typically z=1.96; z^2=3.8416
p-0.74
1-p=0.24
e-0.04
n= 3.84 (0.74)(0.26)/0.04^2
n=461.95 or 462.
I am assuming this is a 95% interval.
