what is mean by arithmetic mean …
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Yogita Ingle 5 years, 8 months ago
Mean or average or arithmetic mean is one of the representative values of data. We can find the mean of observations by dividing the sum of all the observations by the total number of observations.
Mean of raw data:
If x1, x2, x3, ……. xn are n observations, then
Arithmetic Mean = (x1, x2, x3, ……. xn)/n
= (∑xi)/n
1. Weights of 6 boys in a group are 63, 57, 39, 41, 45, 45. Find the mean weight.
Solution:
Number of observations = 6
Sum of all the observations = 63 + 57 + 39 + 41 + 45 + 45 = 290
Therefore, arithmetic mean = 290/6 = 48.3
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