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March 29, 2015

March 29, 2015

Posted by **Marnetta** on Tuesday, December 7, 2010 at 10:01am.

- Statistics -
**MathGuru**, Wednesday, December 8, 2010 at 10:23pmFormula:

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

...where n = sample size, z-value will be 2.575 using a z-table to represent the 99% confidence interval, sd = 42, E = 3, ^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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