Word Count : 361

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Class intervals: 3–4, 4–5, 5–6, 6–7, 7–8, 8–9, 9–10 Frequencies (f): 3, 7, 22, 60, 85, 32, 8 Step 1: Calculate the Mean Midpoints (x) of each class: 3–4 → 3.5 4–5 → 4.5 5–6 → 5.5 6–7 → 6.5 7–8 → 7.5 8–9 → 8.5 9–10 → 9.5 Multiply midpoints by frequencies (f × x): 3 × 3.5 = ________ ___ _________ ___ _____ ____ __________ _______.
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