A variable y y\,y was measured to the nearest whole number. 40 observations are given in the table below.
| yyy | 10 – 19 | 20 – 24 | 25 – 28 | 29 – 30 |
|---|---|---|---|---|
| Frequency | 13 | 7 | 15 | 5 |
A histogram was drawn and the bar representing the 10 – 19 class has a width of 2.5 cm and a height of 2.6 cm.
Find the width and height of the bar representing the 20 – 24 class.
Find the width and height of the bar representing the 25 – 28 class.
