Averages from Grouped Frequency Table

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(0:01) Understanding Grouped Frequency Tables: Organise data into intervals, making it easier to handle large datasets.
(0:50) Identifying the Modal Class: The modal class is the interval with the highest frequency.
(1:10) Finding the Median Class: Calculate the median position with $\large \frac{N + 1}{2}$, where $N$ is the total frequency. Then locate this position in the cumulative frequencies.
(2:00) Estimating the Mean: Find each interval’s midpoint, multiply by its frequency, then sum these products. Divide by the total frequency to get the estimated mean.