Question

Let x1 ,x2 .........xn be the mid points and F1 ,f2...fn are the corresponding class frequencies then the variance is defined as
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Answer 1

Step-by-step explanation:

If the number of observations is odd, then the median is th. 1. 2 n + ... occurring with frequencies f1, f2 , ..., fn ... distribution: x : x1 x2 x3 ... xn f : f1 f2 f3 ... fn. (i) Mean deviation about mean.

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Answer 2

Answer:

The variance is defined as

Step-by-step explanation:

Given :

$x_{1} +x_{2} +x_{3} +....$ are the mid points.

$F_{1} +F_{2} +F_{3} +....$ are the frequencies.

Calculation:

Variance is defined as how far we set the data in our given problem is known as variance.

Variance (σ²)=∑$f_{i}$($x_{i} -x'$)/∑$f_{i}$

Here,$i =1,2,3 .....$