# how to find the sum of deviations of terms from assumed mean? plz reply soon

Dear Student!

The algebraic sum of deviation of observations from the mean is zero.

The algebraic sum of deviation of observations from assumed mean depends on the value of assumed mean.

Example:

 Marks obtained Number of students(fi) Mid pointxi deviation from assumed mean, 35 deviation from assumed mean,55 10 – 20 2 15 –2 –4 20 – 30 3 25 –1 –3 30 – 40 8 35 0 –2 40 – 50 14 45 1 –1 50 – 60 8 55 2 0 60 – 70 3 65 3 1 70 – 80 2 75 4 2 N = 40

The given table shows the deviation of observations when assumed mean is taken as 35 and 55.

Thus, the algebraic sum of deviation of observations from assumed mean depends on the value of assumed mean.

Cheers!

• 0

thanku sir

• -1
What are you looking for?