The mean of 50 observation were calculated as 4.04 when Mr. X took by mistake 10 instead of 8 for an observation. The mean is
Answers
Answered by
1
The mean of all correct 50 observation is 4.0
total sum of 50 observations when Mr.X took wrong observation is equals to
= total no. of observations *The mean of 50 observation
=50*4.04
=202( let it be A)
Sum of observation when he takes correct observation is
= A - wrong observation+ correct observation
=A -10 + 8
= 202-10+8
=200( let it be B)
therefore sum of obseravtions when he take all the observation correct is
B= 200.
therefore correct Mean is = B (Sum of total correct observations)/total no. of observations
MEAN= B/50
MEAN = 200/50
MEAN = 4.0
Similar questions