Assumed mean is taken in which method?
(a) Direct method
(c) Karl Pearson's method
Hoy Step-deviation method
(d) Spearman's method
Answers
answer is direct method
STEP DEVIATION METHOD
Assumed mean is taken in step deviation method.
GETTING TO KNOW MORE ABOUT STEP DEVIATION METHOD:
* The step deviation technique is a method for calculating the mean of big numbers that are divisible by a common factor. By reducing all of the data by a common factor, the variances are reduced to a smaller number.
* In other words, when the deviations of the class marks from the expected mean are considerable and they all share a common component, the step deviation approach is applied.
* A change of origin or scale method is another name for this procedure. Three approaches are used to calculate the mean of grouped data: direct method, assumed or short-cut method, and step deviation method. Because we apply the deviation formula, the step deviation method is considered an extension of the assumed technique.