The mean of 8 observations was found to be 57. Later on, it was discovered that one observation, i.e., 48 was misread as 84. Find the correct mean.
Mean = no. of obs. / sum of all obs.
57= s/8
57 [8] = 8[s/8]
456= s
Since it was later discovered that one of the observations which was actually 48 was mistakenly read as 84, then the Sum S is 8 (84 – 48) too much; therefore, the correct mean is found as follows:
Correct mean = (S – 8)/n
= (456 – 8)/8
= 448/8
Correct mean = 56
Hope u find this useful!
57= s/8
57 [8] = 8[s/8]
456= s
Since it was later discovered that one of the observations which was actually 48 was mistakenly read as 84, then the Sum S is 8 (84 – 48) too much; therefore, the correct mean is found as follows:
Correct mean = (S – 8)/n
= (456 – 8)/8
= 448/8
Correct mean = 56
Hope u find this useful!