The next step is to find the range of the items in the sample. This is found by subtracting the weight of the lightest item from that of the heaviest:

Range = 178 - 175 = 3

You should then add this value to the last box in the first column as shown below.

Date | 01/04 | ||||||
---|---|---|---|---|---|---|---|

Time | 01:00 | ||||||

1 | 177 | ||||||

2 | 176 | ||||||

3 | 178 | ||||||

4 | 177 | ||||||

5 | 175 | ||||||

Sum | 883 | ||||||

Mean | 177 | ||||||

Range | 3 |

You then add this value to your chart. This range value of 3 is then plotted on the R graph at the point where the first vertical line meets the horizontal line representing the value of 3. Do this now on the graph below, by clicking the correct point.