Friday

March 27, 2015

March 27, 2015

Posted by **Jacob** on Saturday, November 27, 2010 at 2:20pm.

- statistics -
**PsyDAG**, Sunday, November 28, 2010 at 10:48amWhat do you mean by "P20 and P65"?

If I assume that those are percentiles, find table in the back of your statistics text labeled something like "areas under normal distribution" to find the Z scores corresponding to the proportions indicated. Insert the values into the following equation.

Z = (score-mean)/SD

**Answer this Question**

**Related Questions**

statistics - Suppose scores on the mathematics section of the SAT follow a ...

statistics - Suppose scores on the mathematics section of the SAT follow a ...

statistics - If scores are normally distributed with a mean of 3.06 and a ...

statistics - If scores are normally distributed with a mean of 3.06 and a ...

statistics - Suppose that SAT scores among U.S. college students are normally ...

Statistics - A distribution of 800 test scores in a biology course was ...

Statistics Math Help - A distribution of 800 test scores in a biology course was...

statistics - Assume that a set of test scores is normally distributed with a ...

statistics - Assume that a set of test scores is normally distributed with a ...

Analytical Skills - If your score on a statistics exam was 76 and the professor ...