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March 5, 2015

March 5, 2015

Posted by **paula** on Sunday, March 17, 2013 at 10:29pm.

- statistics -
**MathGuru**, Monday, March 18, 2013 at 8:08pmUse a formula to find sample size.

Here is one:

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

...where n = sample size, z-value = 1.96 for 95% confidence, sd = 0.26, E = 0.15, ^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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