SOLUTION: The estimate of the population proportion is to be within plus or minus .07, with a 98 percent level of confidence. The best estimate of the population proportion is .20. How large

Algebra ->  Probability-and-statistics -> SOLUTION: The estimate of the population proportion is to be within plus or minus .07, with a 98 percent level of confidence. The best estimate of the population proportion is .20. How large      Log On


   

Question 923654: The estimate of the population proportion is to be within plus or minus .07, with a 98 percent level of confidence. The best estimate of the population proportion is .20. How large a sample is required?

sample size?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
ME = .07, .07, with a 98 percent level of confidence
p = .20
ME = .07 = 2.326(sqrt(.20*.80/n))
n = p(1-p)(z/E)^2
n = .16(2.326/.07)^2 = 177 rounded Up to the next Whole Number