In a frequency distribution table with 12 classes, the class - width is 2.5 and the lowest class boundary is 8.1, then what is the upper class boundary of the highest class?

Question

Philoid · Accepted Answer

Given: number of classes = 12,

Class width = 2.5, and

Lowest class boundary = 8.1

Upper class is given by,

Upper class boundary = Lower class boundary + (width × number of classes)

Substituting values,

⇒ Upper class boundary = 8.1 + (2.5 × 12)

⇒ Upper class boundary = 8.1 + 30 = 38.1

Hence, upper class boundary is 38.1