Question

Formula for shortcut method and step deviation in the measures of central tendency.​

Answer 1

$\bold{YOUR \: ANSWER}$

x1, x 2 ,… x n , are observations with respective frequencies f 1 , f 2 ,. . ., f n .

Let deviation A take at any point, we have

d i = x i - A , where, i = 1,2,3,…, n.

⇒ f i d i = f i ( x i - A ) ; i = 1,2,3,…,n

So mean by this method is given by

Steps involved in finding the meanshort cut method :

1) Prepare a frequency table.

2) Choose A and take deviations d i = x i - A of the values of x i .

3) Multiply f i d i and find the sum of it.

4) Use the above formula and find the mean.

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Answer 2

Step-by-step explanation:

sometimes when the frequency are large in number,this become combersome that can be ckassified if the class intervak of each class is grouped in as same!

thanks!