Mode for Grouped Data (Continuous)

Rarely Tested

$$\mathrm{Mode} = L + \left( \frac{f_m - f_{m-1}}{2f_m - f_{m-1} - f_{m+1}} \right) \times h$$

Where:
$$L$$ = lower boundary of modal class,
$$f_m$$ = modal class frequency,
$$f_{m-1}$$ = frequency of preceding class,
$$f_{m+1}$$ = frequency of succeeding class,
$$h$$ = class width.

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