i) 17, 25, 28, 35, 40
Assumed Mean = 35
A.M \(\overline{X}\) = A + \(\cfrac{\sum(X_i\,-\,A)}{N}\)
A.M. in general method = Sum of the observations / No. of the observations
ii) 5, 6, 7, 8, 8, 10, 10, 10, 12, 12, 13, 19, 19, 19, 20
Assumed Mean = 10
A.M. \(\overline{X}\) = \(\cfrac{\sum(X_i\,-\,A)}{N}\)
A.M. in general method = Sum of the observations / No. of the observations
\(\cfrac{\sum X_i}{N}\)