SOLUTION: A music industry researcher wants to estimate, with a 95% confidence level, the proportion of young urban people (ages 21 to 35 years) who go to at least 3 concerts a year. Previou
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Question 1162802: A music industry researcher wants to estimate, with a 95% confidence level, the proportion of young urban people (ages 21 to 35 years) who go to at least 3 concerts a year. Previous studies show that 42% of those people (21 to 35 year olds) interviewed go to at least 3 concerts a year. The researcher wants to be accurate within 1% of the true proportion. Find the minimum sample size necessary Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! half-interval of a 95% CI is z*sqrt(0.42*0.58/n)=0.01
z=1.96
square both sides
3.8416*0.42*0.58/n=0.0001
n=9358.14 or 9359
