Question

find mean for the value a=62.5,Sigma fiui=-13,Sigma fi =100 and h=15.​

Answer 1

Answer:

mean for the value a=62.5,Sigma fiui=-13,Sigma fi =100 and h=15.

Answer 2

The mean of the data is 60.55

Given:

The value A = 62.5, ∑fiui = - 13, ∑fi = 100 and h = 15    

To find:

Find the mean from the given data

Solution:  

Formula used:

The formula for the Mean by the Step Deviation Method

x = A + h × (Σfiui / Σfi)  

Where  

A = Assumed mean

h = class size

fi = frequency  

From given data

A = Assumed mean = 62.5

h = class size =  15

fi = frequency = 100

∑fiui = - 13  

By the given formula,

The mean of the data = 62.5 + 15 × (- 13 / 100)  

= 62.5 - (195 / 100)    

= 62.5 - 1.95

= 60.55  

Therefore,

The mean of the data is 60.55.

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