Mathematics for IGCSE & O level - Categorical, Numerical And Grouped Data (Section 3 - No. 9)
What is the formula for the midpoint of a class interval?
(Upper class limit - Lower class limit) / 2
(Upper class limit + Lower class limit) / 2
Upper class limit * Lower class limit
Lower class limit - Upper class limit
Explanation
The midpoint is calculated by averaging the upper and lower limits.
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