Sunday

September 21, 2014

September 21, 2014

Posted by **StudentD** on Wednesday, August 15, 2012 at 12:34pm.

A. 68%

B. 80%

C. 95%

D. 99%

- statistics -
**PsyDAG**, Thursday, August 16, 2012 at 1:56pmYou haven't memorized the proportion within 2 standard deviations from the mean?

Z = (score-mean)/SD

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.

- statistics -
**Anonymous**, Tuesday, July 8, 2014 at 7:51pm12

**Answer this Question**

**Related Questions**

Statistics - 18. The Intelligence Quotient (IQ) test scores are normally ...

statistics - The test scores of students in a class test have a mean of 65 and ...

algebra 2 - Students at a high school all took the same English test. The scores...

Statistics - The scores for math test #3 were normally distributed. If 15 ...

statistics - Suppose a college's SAT scores are normally distributed with mean ...

Statistics - Suppose you administered an anxiety test to a large sample of ...

statistics - Suppose you administered an anxiety test to a large sample of ...

graduate statistics - A nursing professor was curious as to whether the students...

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

Statistics - Students were given an exam with 300 multiple-choice questions. The...