The mean of discrete obervations $y_{1}, y_{2}$ , ................ , $y_{n}$ is given by

\frac{\sum_{i = 1}^{n} y_{i}}{n}

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\frac{\sum_{i = 1}^{n} y_{i}}{\sum_{i = 1}^{n} i}

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\frac{\sum_{i = 1}^{n} y_{i} f_{i}}{n}

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\frac{\sum_{i = 1}^{n} y_{i} f_{i}}{\sum_{i = 1}^{n} y_{i} f_{i}}

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Solution

The correct option is B $\frac{\sum_{i = 1}^{n} y_{i}}{n}$
Mean of terms = $\frac{S u m}{n u m b e r}$

Therefore, Mean = $\frac{\sum_{i = 1}^{n} y_{i}}{n}$

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Similar questions

Q. The mean of discrete observations

y_{1}, y_{2} . . . . . ., y_{n}

is given by

The mean of discrete observations $y_{1}, y_{2}, \dots \dots y_{n}$ is given by

Q. The mean of a discrete frequency distribution x_i / f_i, i = 1, 2, ......, n is given by

(a)

\frac{Σ f_{i} x_{i}}{Σ f_{i}}

(b)

\frac{1}{n} \sum_{i = 1}^{n} f_{i} x_{i}

(c)

\frac{\sum_{i = 1}^{n} f_{i} x_{i}}{\sum_{i = 1}^{n} x_{i}}

(d)

\frac{\sum_{i = 1}^{n} f_{i} x_{i}}{\sum_{1 = 1}^{n} i}

The mid - points of class intervals $x_{i}$ along with respective frequencies $f_{i}$ for recorded observations are given. Calculate the mean deviations about mean $¯ ¯ ¯ x$

Standard deviation about mean $(¯ x)$ for a given discrete frequency distribution $x_{1}, x_{2}, x_{3}, . . . . . x_{n}$ with frequencies $f_{1}, f_{2}, f_{3}, . . . f_{n}$ is

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The mean of discrete obervations y1,y2 , ................ , yn is given by

The correct option is B ∑ni=1yinMean of terms = SumnumberTherefore, Mean = ∑ni=1yin

The mean of discrete obervations $y_{1}, y_{2}$ , ................ , $y_{n}$ is given by

The correct option is B $\frac{\sum_{i = 1}^{n} y_{i}}{n}$
Mean of terms = $\frac{S u m}{n u m b e r}$

Therefore, Mean = $\frac{\sum_{i = 1}^{n} y_{i}}{n}$