August MCAT stats up

[rager1]

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The overall mean was higher than ever. I wonder if it's a typo. 25.5 seems...odd. April's average is a 24.8 but the mean of combined of April and August is 24.7...does this seem odd to anyone especially when considering that August had many more test takers than April?

http://www.aamc.org/students/mcat/examineedata/august03tbl1.pdf


It looks like hardly anyone got 15s on Verbal and there were sizeable percentages on the low end...a testament to how difficult that section was this past august.

--Rager1

 

[ventricle]

This seems odd. The sum of the section means for August (8.1 + 8.1 + 8.5) is 24.7 -- NOT 25.5. Assuming the same number of people completed each section, I don't think it is possible for the overall mean to differ from the sum of the section means. Or am I losing it?

 

[maygirl]

No, that's not true. The sum of the means of each section can, and most likely will be, different from the combined mean.

 

[ventricle]

Show me.

Remember I am assuming the same number of people completed each section.

 

[maygirl]

Okay, I take it back. You're right. Actually thought it through on paper this time.

 

[ventricle]

Right.

So it seems like Rager1 is correct in suspecting an error.