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March 6, 2015

March 6, 2015

Posted by **Adam Dane** on Sunday, March 31, 2013 at 3:10pm.

(a) How large of a sample is required?

(b) How large of a sample would be necessary if no estimate were available for the proportion that support current policy?

- Statistics -
**MathGuru**, Monday, April 1, 2013 at 6:58pm(a)Formula to find sample size:

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

... where n = sample size, z-value is found using a z-table for 99% confidence, p = 0.62, q = 1 - p, ^2 means squared, * means to multiply, and E = 0.028.

Plug values into the formula and calculate n.

(b) Use p = 0.5 and q = 0.5

Recalculate.

I hope this will help get you started.

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