1. To draw a histogram to represent the following frequency distribution:
| Class interval | \(5 - 10\) | \(10 - 15\) | \(15 - 30\) | \(30 - 45\) | \(45 -65 \) |
| Frequency | \(3\) | \(18\) | \(8\) | \(18\) | \(15\) |
The adjusted frequency for the class \(30 - 45\) is:
2. While constructing a frequency polygon for a grouped continuous frequency distribution, the plotted points have frequencies on the y-axis and ________ on the x-axis.