Mathematics for IGCSE & O level - Categorical, Numerical And Grouped Data (Section 1 - No. 32)
In a frequency table for grouped data, what is the purpose of multiplying the midpoint by its frequency?
To find the range.
To help calculate an estimate of the mean.
To find the median.
To identify the mode.
คำอธิบาย
These products are summed to calculate the mean.