Question

The mean of 12 values of a data is calculated as 19.25 one more values included in the data then for 13 values of the new data the mean becomes 12 find the value of 13 observation

Answer 1

Answer:

given mean of 12 observations = 19.25

sum of 12 observations are = 231

one observation is added

then become 13 observations

then mean of 13 observation is = 12

then sum of 13 observations = 156

them 13th observation = 231 - 156

= 75

Answer 2

Answer:

the value of this 13th observation is 20

Step-by-step explanation:

hope it's helpful