Question

Given that the mean of the observations: x, (x+3), (x+5), (x+7), (x+10) is 9 . Calculate: i) the value of x ii) the mean of the last three observations

Answer 1

Answer:

x = -3.2

Step-by-step explanation:

x, (x+3), (x+5), (x+7), (x+10) is 9

5x + 3 + 5 + 7 + 10 = 9

5x +25 = 9

5x = 9-25

5x = -16

x = -16/5

x = -3.2