Question

What is the mean of Variable A? Express answer to one decimal place.

Answer 1

Variable A - horizontal axis ⇒ x
Variable B - vertical axis ⇒ y

points (x, y)
       A      B
1)    2 ,    2
2)    2 ,    8
3)    4 ,    3
4)    5 ,    1
5)    6 ,    3
6)    7 ,    5 
7)    8 ,    6
8)    9 ,    2

Mean of Variable A.
(2 + 2 + 4 + 5 + 6 + 7 + 8 + 9) ÷ 8 = 43 ÷ 8 = 5.375   OR  5.40

Mean is the average value of the data set. Add all the numbers in the data set and divide its sum by its count.