Posted by chalulu on Sunday, March 13, 2011 at 5:30pm.
A researcher at a major hospital wishes to estimate the proportion of the adult population of the U.S. that has high blood pressure. How large a sample is needed in order to be 99% confident that the sample proportion will not differ from the tgrue proportion by more than 4%?

statistics  MathGuru, Wednesday, March 16, 2011 at 8:50pm
Formula:
n = [(zvalue^2 * p * q)]/E^2
...where n = sample size, zvalue will be 2.58 using a ztable to represent the 99% confidence interval, p and q represent proportions, E = .04, ^2 means squared, and * means to multiply.
Note: p and q will both be .5 if no value is stated.
Plug the values into the formula and finish the calculation. Round your answer to the next highest whole number.

statistics  Anonymous, Wednesday, October 5, 2016 at 10:41pm
3e
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