Question

arithmetic mean of 9 observations is 38 but. is doing so an observation 27 is mistaken for 72 find the actual mean of the data​

Answer 1

Answer:

Mean of 9 observation is 38

Therefore Total of 9 observation = 38× 9

= 342

Given that instead of 27, 72 is taken therefore corrected total

= 342 - 72 + 27

= 297

Mean = 297/9

= 33