Question

Mean of a grouped data calculated using direct method, assumed mean method or step deviation method are the same?

Answer 1

Thank you for asking this question. Here is your answer:

The options for this question are missing. Here are the missing options:  (A) Is the same (B) Varies slightly (C) has huge variation (D) none of these

The direct method is: Sum of all observation/ total number of observation

Assumed mean method

a = Assumed mean

= a + sum(FX)/sumX

And the other one is deviation method which takes the less time to solve it

So A is the final answer for this question.