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Find the mode of: classes 0–5, 5–10, 10–15, 15–20 with frequencies 14, 10, 6, 4.

Competition practiceStatistics

A2 1/2
B3 2/11
C4 2/3
D3 8/9

Step-by-Step Solution

Modal class 0–5 (first class, so

f_{0} = 0

): Mode

= 0 + \frac{14 - 0}{28 - 0 - 10} \times 5 = \frac{70}{18} = 3 \frac{8}{9}

.

Answer: D) 3 8/9

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