Posted by Mary on Monday, June 6, 2011 at 7:15pm.
George scored a 62 on his AP World History test and had a zscore of 3.75. Julie is also in the class with George and scored an 83 on the same test, with a zscore of 1.5. From this information, FIND THE CLASS mean and standard deviation.

Statistics. I Need Help Please  Mgraph, Monday, June 6, 2011 at 8:41pm
(62mean)/st.dev.=3.75
(83mean)/st.dev.=1.5
Solve this system.

Statistics. I Need Help Please  Mary, Monday, June 6, 2011 at 8:49pm
thanks. my teacher gave me the answer, but i don't know how to get to it. So is this the way to get to the answer
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