The mean of first 8 observation is 12.5 and the mean of next 7 observation is 5. What is the mean of all the observations?
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It's very simple.
Add both total then find the total mean.
12.5×8 + 7×5=135 is to be divided by 13 so the total mean is 135÷13= 10.38 approx.
Add both total then find the total mean.
12.5×8 + 7×5=135 is to be divided by 13 so the total mean is 135÷13= 10.38 approx.
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