Question

The mean of 15 observation is 38.2 it was found later on that the number 25 was misread as 52 find the actual mean

Answer 1

Answer:

mean  = ∑x /n  

38 = ∑x/15

38*15 = ∑x  

∑x = 570 = incorrect value

correct value = 570 - 52 + 25

                       = 543

correct mean = 543/15

                      = 36.2