Question

the mean of 11 observation is 12 .if one observation 17 is deleted then the new mean is​

Answer 1

Hope it helps you and have a nice day

Answer 2

Step-by-step explanation:

Since, mean of 11 observation is 12

Therefore, total observations = 11 x 12 = 132

Since, one observation 17 is deleted.

Therefore, total of new observations = 132 - 17 =115

No of new observations = 11 - 1 = 10

Now,

$New \: mean \: = \frac{115}{10} = 11.5$