Question

How to find whether it's direct or step deviation method in statistics

Answer 1

Step-by-step explanation:

Shortcut method and step deviation method of finding mean are basic procedure to reduce the mathematical calculations when we do not have to use calculator and the numbers are difficult to calculate.

There is no such condition for where to use shortcut and where to use step deviation method but in order to ease your calculations I would like to tell you that whenever you observe the numbers in data are in a series of additive nature use shortcut method and whenever you observe the data set in the series are of multiplicative nature use step deviation method.

While using these methods try to get the new adjusted data in either one numeric form or two numeric form.

Answer 2

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Arithmetic Mean of grouped data using step deviation - formula. Step Deviation Method: Calculating the Mean by using Step Deviation Method. A= The middle value that is assumed as the mean for calculation, ∑i=1nfi= Sum of the frequencies given, can be denoted by N.