SOLUTION: 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, wh

Algebra ->  Probability-and-statistics -> SOLUTION: 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, wh      Log On


   

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 for n for the combined sample?
Answer by ikleyn(52824) About Me  (Show Source):
You can put this solution on YOUR website!
.
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%28cross%28for_n%29%29 for the combined sample?
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I'd formulate it in more simple manner: 

    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.


Solution 

The new mean for combined samples = %287%2A12+%2B+12%2A8%29%2F%2812%2B8%29 = 9.   ANSWER

Solved, answered and completed.

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