Sunday

January 25, 2015

January 25, 2015

Posted by **Lorie** on Thursday, October 13, 2011 at 1:50pm.

- Statistics -
**MathGuru**, Friday, October 14, 2011 at 6:00pmHere is one formula you might use for this problem:

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

With your data:

n = [(1.96)^2 * .5 * .5]/.10^2

I'll let you finish the calculation (round to the next highest whole number).

Note: n = sample size needed; .5 for best estimate of the population proportion; .5 for q, which is (1 - p). E = maximum error, which is 10% or .10 from the problem. Z-value is found using a z-table (for 95%, the value is 1.96).

I hope this helps.

**Answer this Question**

**Related Questions**

statistics - John Davis, a manager of a supermarket, wants to estimate the ...

Statistics - A large corp wants to estimate the proportion of independent ...

statistics - 2. An investigator wants to estimate caffeine consumption in high ...

Statistics - Suppose the U.S. president wants an estimate of the proportion of ...

Stat Help - A researcher wishes to be 95% confident that her estimate of the ...

Statistics - An investigator wants to estimate caffeine consumption in high ...

statistics - An investigator wants to estimate caffeine consumption in high ...

statistics - The head of a computer science department is interested in ...

Statistics #3 - The estimate of the population proportion is to be within plus ...

Statistics - People end up tossing 12% of what they buy at the grocery store (...