Find the mean of the following frequency distribution:
Variable (xi) | 10 | 30 | 50 | 70 | 89 |
Frequency (fi) | 7 | 8 | 10 | 15 | 10 |
Let’s draw the table and calculate the relative value of variables.
Variables (xi) | frequency (fi) | (xi×fi) |
10 | 7 | 70 |
30 | 8 | 240 |
50 | 10 | 500 |
70 | 15 | 1050 |
89 | 10 | 890 |
∑fi = 50 | ∑xi×fi = 2750 |
By putting the formula of mean we get;
Mean = 
= 55
So the mean of the given distribution will be 55.
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