Mathematics for IGCSE & O level - Categorical, Numerical And Grouped Data (Section 8 - No. 7)
In the context of grouped discrete data, what is the purpose of multiplying the midpoint of a class by its corresponding frequency?
To find the range of that class.
To estimate the total sum of values within that class.
To find the median of that class.
To calculate the mode for that class.
Explanation
Multiplying the midpoint by the frequency is part of the process for estimating the mean of grouped data. This gives an estimate of the sum of the data values within that class interval.
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