Question

Which formula gives the class mark of a class interval?

Options

• \[ \text{Class Mark} = \text{Lower Limit} + \text{Upper Limit} \]

• \[ \text{Class Mark} = \frac{\text{Frequency}}{2} \]

• \[ \text{Class Mark} = \frac{\text{Lower Limit} - \text{Upper Limit}}{2} \]

• \[ \text{Class Mark} = \frac{\text{Lower Limit} + \text{Upper Limit}}{2} \]

Answer 1

The class mark is the midpoint, so the correct formula adds the lower and upper limits and divides by 2.