Question

Mean of 13 observations is 8,one observation 20is detected then find the mean of remaining observations

Answer 1

Answer:

7

Step-by-step explanation:

Mean of 13 observations = 8

Therefore, Sum of 13 observations = 13*8=104

Sum of remaining 12 observations = 104-20=84

Thus, Mean of 12 observations = 84/12=7

Answer 2

Answer:

The mean of the remaining observations is 7

Step-by-step explanation:

They have given that the mean of 13 observations is 8

$Mean =\frac{Sum}{n}$

n = number of observations

$8=\frac{Sum}{13}$

Sum = 104

They have given that one of the observations is 20

The sum of the remaining observations is given by

= 104 - 20

= 84

The total remaining observations are 12

The mean of the remaining observations is given by

$Mean =\frac{84}{12}$

Mean = 7

Therefore the mean of the remaining observations is 7