Homework Help: Statistics

Posted by Sue on Sunday, May 2, 2010 at 7:56pm.

I'm confused.Can someone tell me if I have done this correct.I'm trying to get the average using a weighted scale:
TOTAL GRADES: WEIGHT
90% 5%
100% 15%
95% 15%
90% 5%
94.5% 60%
I multiplied the total grade by the percent, then added the percent. But I get 109.20 as a final grade but I know that can be right...please help me. Thanks

Statistics - steph, Sunday, May 2, 2010 at 8:40pm
you prolly multiplied wrong. 90 * .05
100*.15, 95*.15,90*.05,94.5*.60 then is should all equal out to 94.68

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