The mean of discrete observations \( y_{1}, y_{2}, \ldots, y_{n} \)...
The mean of discrete observations \( y_{1}, y_{2}, \ldots, y_{n} \) is
P given by
(1) \( \frac{\sum_{i=1}^{n} y_{i} f_{i}}{\sum_{i=1}^{n} f_{i}} \)
(2) \( \frac{\sum_{i=1}^{n} y_{i} f_{i}}{n} \)
(3) \( \frac{\sum_{i=1}^{n} y_{i}}{n} \)
(4) \( \frac{\sum_{i=1}^{n} y_{i}}{\sum_{i=1}^{n} i} \)
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