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1/21/2007 11:13:27 AM EDT
Caclulate the overall mean to 2 decimal places.
Group 1 Mean score of 84 w/ 13 students
Group 2 Mean score of 69 w/ 31 students
Goup 3 Mean score of 76 w/ 27 students

Every way I do this I get the same answer but it tells me I'm wrong. WTF
1/21/2007 11:31:33 AM EDT
[#1]
Is it...

((84 * 13) + (69 * 31) + (76 * 27)) / (13 + 31 + 27) = 74.408

-Foxxz
1/21/2007 11:40:41 AM EDT
[#2]
Yeah that is the answer I was getting, but the stupid online test kept telling me I was wrong. Now I've got a second answer so I can emial them and tell them its FUBAR. Thanks
1/21/2007 3:10:28 PM EDT
[#3]

Quoted:
Yeah that is the answer I was getting, but the stupid online test kept telling me I was wrong. Now I've got a second answer so I can emial them and tell them its FUBAR. Thanks


You will discover that most computer based learning aids generally suck. They are editied by persons of questionable skill. The same is true for many new text books. Errors abound, yet hillarity does NOT ensue.
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