Mathematics for IGCSE & O level - Statistical Diagrams (Section 2 - No. 30)
How can you find the number of data points within a specific range using a cumulative frequency diagram?
Subtract the cumulative frequencies at the start and end of the range.
Add the cumulative frequencies at the start and end of the range.
Divide the range by the total number of data points.
It's not possible to find this information.
Explicación
Find the cumulative frequency for the upper bound, and subtract the cumulative frequency for the lower bound of the interval.