Sunday

December 21, 2014

December 21, 2014

Posted by **Sarah** on Monday, September 13, 2010 at 7:58pm.

- statistics -
**MathGuru**, Monday, September 13, 2010 at 8:11pmFormula:

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

...where n = sample size, z-value will be 1.96 using a z-table to represent the 95% confidence interval, sd = square root of 14 (standard deviation is equal to the square root of the variance), E = 2, ^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.

- statistics -
**Sarah**, Monday, September 13, 2010 at 8:24pmSo the answer would be 13.4459 ?

- statistics -
**MathGuru**, Monday, September 13, 2010 at 9:23pmLooks OK! Round up to the next highest whole number, which would be 14.

- statistics -
**Edddddy**, Monday, February 28, 2011 at 1:56amThanks MathGuru, the formula helped with a relevant math problem.

**Answer this Question**

**Related Questions**

statistics - Scores on a certain test are normally distributed with a variance ...

statistics - the admissions policy at a certain university requires that ...

statistics - the admissions policy at a certain university requires that ...

Statistics - M/C - 14. The marks on a statistics test are normally distributed ...

statistics - 2. A test measuring basic math skills in adults is normally ...

business statistics - Your statistics instructor wants you to determine a ...

Stats - Suppose that a random sample of adults has a mean score of on a ...

statistics! - 1) Entry to a certain University is determined by a national test...

statistics probability - Alice earned a score of 940 on an IQ test.The mean test...

statistics - Ram earned a score of 940 on a national achievement test. The mean ...