Posted by Mike on Tuesday, February 28, 2012 at 10:03pm.
A test was given out to a class of 20 students. The highest possible score to get is 30. The mean of the tests came out to 26. One student was caught cheating and got 20 points removed from their test. what is the new mean. 28,25,24,22 ?

statistics  PsyDAG, Wednesday, February 29, 2012 at 12:15pm
Mean = Σx/n
26 = Σx/20
Σx = 520  20 = 500
new Mean = 500/20 = ?