Friday

October 31, 2014

October 31, 2014

Posted by **nicole** on Tuesday, May 24, 2011 at 12:56am.

The percentage of scores less than 80 is?

- statistics -
**drwls**, Tuesday, May 24, 2011 at 2:17amSince 80 is the mean, the fraction le4ss than that is 50%. You don't need to invoke a 68-95-99.7 rule to figure that out. You also don't need to know the standard deviation.

**Answer this Question**

**Related Questions**

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 ...

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

statistics - Using the 68-95-99.7 rule: Assume that a set of test scores is ...

statistics - Using the 68-95-99.7 rule: Assume that a set of test scores is ...

statistics - Using teh 68-95-99.7rule. Assume that a set of test scores is ...

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

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 ...

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