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July 31, 2014

July 31, 2014

Posted by **Arlene** on Wednesday, April 4, 2012 at 4:31pm.

- statistics -
**MathGuru**, Wednesday, April 4, 2012 at 8:36pmFormula:

n = [(z-value * sd)/E]^2

...where n = sample size, z-value will be 2.58 using a z-table to represent the 99% confidence interval, sd = 4, E = 0.5, ^2 means squared, and * means to multiply.

Plug the values into the formula and finish the calculation. Round your answer to the next highest whole number.

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