The average score on a standardized test is 750 points with a standard deviation of 50 points. If 2,000
students take the test at a local school, how many students do you expect to score between 700 and 800
points?
2 answers
http://davidmlane.com/hyperstat/z_table.html
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion using the two Z values and multiply by 2,000.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion using the two Z values and multiply by 2,000.
2 answers