How do we get the assume mean A in the step deviation method ? 

Asked by jameelraza11 | 3rd Sep, 2015, 08:14: PM

Expert Answer:

space A s s u m e d space m e a n space i s space t a k e n space a c c o r d i n g space t o space t h e space c o n v e n i e n c e space s o space t h a t space t o space m i n i m i z e space t h e space c a l c u l a t i o n s. C o n s i d e r space t a k i n g space t h e space m i d d l e space o f space t h e space d a t a space v a l u e s space a s space t h e space a s s u m e d space m e a n. C o n s i d e r space t h e space f o l l o w i n g space e x a m p l e colon
 
Solution:
I n space t h e space a b o v e space e x a m p l e comma space c l a s s space m a r k s space a r e space 35 comma 45 comma 55 comma 65 comma 75 space a n d space 85. H e n c e space y o u space c a n space t a k e space t h e space m i d d l e space v a l u e comma space t h a t space i s space e i t h e r space i t space c a n space b e space 55 space o r space 65. I n space t h i s space p r o b l e m space w e space h a v e space a s s u m e d space t h e space m e a n space a s space 65.

Answered by Vimala Ramamurthy | 4th Sep, 2015, 09:01: AM

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