Question

The mean of 8 observations is 9. Two new observations 10 and 13 are added to the group. Find the mean of 10 observations​

Answer 1

Answer:

9.5

Step-by-step explanation:

(x1+x2+x3+x4+x5+x6+x7+x8)/8=9

x1+x2+x3+x4+x5+x6+x7+x8=72

(x1+x2+x3+x4+x5+x6+x7+x8+10+13)/10

(72+10+13)/10=95/10=9.5