Approximate the mean of the grouped data. Pone calls per day (x) Frequency (f) 8 - 11 31 12 - 15 34 16 - 19 28 20 - 23 30 24 - 27 6 17.3 17.2 16.4 16
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The midpoint is calculated as the average of the lower and upper boundaries of each class. - For 8-11: Midpoint = (8 + 11) / 2 = 9.5 - For 12-15: Midpoint = (12 + 15) / 2 = 13.5 - For 16-19: Midpoint = (16 + 19) / 2 = 17.5 - For 20-23: Midpoint = (20 + 23) / 2 = Show more…
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