SOLUTION: a reasearcher wishes to estimate with 95% confidence the proportion of adults whohave high speed internet access. her estimate must be accurate within 2% of the true proportion. fi

Algebra ->  Probability-and-statistics -> SOLUTION: a reasearcher wishes to estimate with 95% confidence the proportion of adults whohave high speed internet access. her estimate must be accurate within 2% of the true proportion. fi      Log On


   

Question 773074: a reasearcher wishes to estimate with 95% confidence the proportion of adults whohave high speed internet access. her estimate must be accurate within 2% of the true proportion. find the minimum sample size needed using a prior study that fouhd that 46% of the respondents said they have high speed internet access. no preliminary estimate is available. find the minimum sample size needed
Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
Hi,
We need to find n
where z(0.025)sqrt(0.46(0.54)/n) < = 0.02
1.96sqrt(0.46(0.54))/0.02 <= sqrt(n)
48.84 < = sqrt(n)
n > = 2385.63
Answer: n must be at least 2386



I can help you with more questions at: mthman@gmail.com
Thanks