Question 1145463
.
one sample of n=12 scores has a mean of M=7 and a second sample of n=8 scores has a mean of M=12. 
You were asked to find a new mean for the combined samples. Based on your work, what was the value 
{{{highlight(cross(for_n))}}} for the combined sample?
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I'd formulate it in more simple manner:


<pre>
    one sample of 12 scores has a mean of 7 and a second sample of 8 scores has a mean of 12. 
    Find the mean for the combined samples. 
</pre>


<U>Solution</U>


<pre>
The new mean for combined samples = {{{(7*12 + 12*8)/(12+8)}}} = 9.   <U>ANSWER</U>
</pre>

Solved, answered and completed.


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