Question

Find the mean and range.

26 19 23 39 31 34 23 25

Answer 1

QUESTION 1

The given data set is;

`26,19,23,39,31,34,23,25`

The mean can be found using the formula;

`\bar X =(\sum x)/(n)`

`\Rightarrow \bar X =(26+19+23+39+31+34+23+25)/(8)`

`\Rightarrow \bar X =(220)/(8)`

`\Rightarrow \bar X =27.5`

QUESTION 2

To find the range we may sort the data to obtain;

`19,23,23,25,26,31,34,39`

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;

`Range=39-19`

`\Rightarrow Range=20`

Answer 2

range: largest number minus the smallest number
39 - 19 = 20
your range is 20

Mean: add all of the numbers and divide by the amount of numbers there are.

26+19+23+39+31+34+23+25= 220
220/8 = 27.5

your mean is 27.5

hope this helps