The frequency distribution of a variable x is xi : 2 3 1 5 fi : 1 2 3 1 then the mean is ans.
Question
The frequency distribution of a variable x is
xi | 2 | 3 | 1 | 5 |
---|---|---|---|---|
fi | 1 | 2 | 3 | 1 |
then the mean is
ans.
Solution
The mean (or average) of a frequency distribution can be calculated using the formula:
Mean = Σ(xi * fi) / Σfi
Where: xi = value of the variable fi = frequency of the variable
Let's calculate:
Mean = [(21) + (32) + (13) + (51)] / (1 + 2 + 3 + 1) Mean = [2 + 6 + 3 + 5] / 7 Mean = 16 / 7 Mean = 2.29 (rounded to two decimal places)
So, the mean of the given frequency distribution is approximately 2.29.
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