Calculation for discrete series or ungrouped data , Applied Statistics

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Calculation for Discrete Series or Ungrouped Data

The formula for computing mean is

where,

f = frequency

X = variable

In a survey of 50 chemical industries, the following data was collected about the level of profits attained by them:

X_i = Level of
profit (Rs. lakh)
earned during 20x1-x2

f_i = No. of companies that earned X_i amount of profit

X_if_i

240

192

175

248

Total

1095

The arithmetic mean is

592_discrete series1.png

Thus, the average profit of the chemical industry is Rs.21.90 lakh

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