Question

calculate the average (mean) of the data shown, to two decimal places
x
19.9
2.3
15
28
8.8
20.5
20.1
7.3
26.6

Explanation:

Step1: Sum the data values

$19.9 + 2.3+15 + 28+8.8+20.5+20.1+7.3+26.6=148.5$

Step2: Divide by number of data points

There are 9 data - points. So, the mean is $\frac{148.5}{9}=16.50$

Answer:

$16.50$