QUESTION 1
The given data set is;
[tex]26,19,23,39,31,34,23,25[/tex]
The mean can be found using the formula;
[tex]\bar X =\frac{\sum x}{n}[/tex]
[tex]\Rightarrow \bar X =\frac{26+19+23+39+31+34+23+25}{8}[/tex]
[tex]\Rightarrow \bar X =\frac{220}{8}[/tex]
[tex]\Rightarrow \bar X =27.5[/tex]
QUESTION 2
To find the range we may sort the data to obtain;
[tex]19,23,23,25,26,31,34,39[/tex]
We see that the maximum value is 39 and least value is 19
The range is the largest value minus the least value.
This implies that;
[tex]Range=39-19[/tex]
[tex]\Rightarrow Range=20[/tex]
