SOLUTION: A researcher wishes to determine, within 4%, the true proportion of college males who play video games. A previous study found that 63% of college males had played video games. If

Question 1150403: A researcher wishes to determine, within 4%, the true proportion of college males who play video games. A previous study found that 63% of college males had played video games. If she wishes to be 95% confident that her estimate contains the population proportion, how larger a sample will be necessary?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
the half-interval is 0.04
the half-interval is z*sqrt(p*(1-p)/n)=1.96*sqrt(.63*.37/n)
set them equal to each other
square both sides to remove the square root term
0.0016=3.8416*.2331/n
.0016n=0.8955
n-559.67 or 560

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