Monday

October 20, 2014

October 20, 2014

Posted by **erica** on Friday, May 11, 2012 at 12:06pm.

1. what scores fall between -1 and +1 standard deviation?

2. what percent of all scores fall between -1 and +1 standard deviation?

3. what score falls at +2 standard deviations?

4. What percentage of scores falls between +1 and +2 standard deviations?

- statistics -
**PsyDAG**, Friday, May 11, 2012 at 12:42pmZ score is your score in terms of standard deviations.

Z = (score-mean)/SD

For the percentages, find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score. Multiply by 100 for the percentage.

**Answer this Question**

**Related Questions**

MATH - A mean score on a standardized test is 50 with a standard deviation of 10...

Stastics - When we convert x-value to z- score and use Standard Normal ...

statistics - A standardized third grade reading test, called the We Can Read ...

statistics - 2. Why is it important to know the mean and standard deviation for ...

statistics - Three students take equivalent stress tests. Which is the highest ...

statistics - Three students take equivalent stress tests. Which is the highest ...

Statistics - The distribution of IQ scores is a nonstandard normal distribution ...

Statistics - The distribution of scores on a test is mound-shaped and symmetric ...

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

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