Question

One sample has n = 4 scores and m = 10. a second sample has n = 8 scores and m = 4. if the two samples are combined, what is the mean for the combined sample?

1. Based on the above, The mean of the combined sample is  5.53.

### What is the mean about?

The given parameters  of the question were:
• The number of the first sample = 4
• The mean of the first sample = 10
• The number of the second sample = 8
• The mean of the second sample = 4
Therefore, To find:
The combined mean of the two samples
The total sample number = 4 + 8 = 13
The sum of the first sample = 4 x 20 = 40
The sum of the second sample = 8 x 4 = 32
The sum of the two samples = 40 + 32= 72
The mean of the combined samples;
72/13 = 5.53
Therefore, Based on the above, The mean of the combined sample is  5.53.
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