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mackattack

(344 posts)
3. Thanks, I figured it out
Thu Mar 29, 2012, 01:23 PM
Mar 2012

When you start a new class the grade area already has a column for the average. I assumed that was the total number of points divided by the total number of possible points. That is general idea, right?

Apparently, on Blackboard, the "Average" calculated column actually calculates the "mean percentage correct". That is, it takes the total number of percentage points awarded per column, adds them up, then divides by the number of columns.

Why the heck would ever want that?!?! The best part about it is that there is no explanation of it on Blackboard. I found this out on a blog of some guy who answers FAQs on blackboard.

Ive been in BB all semester using courses that were built utilizing the AVG calculation and trying to figure out the problem. Now I know...but how many others dont??? Because if you use excel to calculate the true average and compare the 2 calculations some of the students grades are "close enough" (1% either way), but some are waaaaaay off.

I get it, technically their definition of average is correct. An average can be any arithmetic mean...but shouldnt the type average be noted....because the mean % correct is a specific type of average. I wonder how many realize it is not a points earned/points possible average....its actually an internally weighted average....

To get the GPA you have to change the "total points" column to a "percentage" column.

Students and teachers, always double check your grades.

Sorry for the rant but Blackboard does an awesome job of annoying everyday.


Thanks for your reply

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