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March 3, 2015

March 3, 2015

Posted by **susan** on Sunday, July 24, 2011 at 8:17pm.

- statistics -
**MathGuru**, Monday, July 25, 2011 at 7:28pmFormula:

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 = 535, E = 137, ^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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