Saturday

December 20, 2014

December 20, 2014

Posted by **Tegan** on Tuesday, February 5, 2008 at 1:25am.

- statistics -
**drwls**, Tuesday, February 5, 2008 at 1:41amz/sigma = score - mean

2 sigma = 88 - mean

-sigma = 79 - mean

subtract second equation from first.

3 sigma = 9

sigma = 3 is the standard deviation

Use either equation to get the mean

**Answer this Question**

**Related Questions**

statistics - In a population of exam scores,a score of X= 48 corresponds to z= 1...

statistics - In a population of exam scores, a score of X = 48 corresponds to z...

statistics - In a population of exam scores, a score of X=88 corresponds to z= +...

statistic - In a population of exam scores, a score of X 48 corresponds to z...

Math - In a population of exam scores, a score of X=88 corresponds to z= +2.00 ...

stats - 2. A standardized exam was provided to all 3rd graders in Arizona ...

Statistics - IQ test scores are normally distributed with a mean of 100 and a ...

statistics - A score that is 6 points below the mean corresponds to a z-score of...

statistics - A score that is 10 points below the mean corresponds to a z-score ...

Stats - The scores on a mathematics exam have a mean of 65 and a standard ...