Question

A person has decided to construct a frequency distribution for a set of data containing 100 numbers. The lowest number is 20 and the highest number is 80. If 5 classes are used, the class width should be approximately _______.

Answer 1

The answer is "12".

Explanation:

Lowest number
`=20\\\\`

highest number
`=80\\\\`

Number of classes
`=5\\\\`

Range=highest number-lowest number

`=80-20\\\\=60\\\\`

class width
`=\frac{Range}{\text{number of classes}}`

`=(60)/(5)\\\\=12`