Find the lower quartile (Q1) for the data: 15, 20, 25, ... – Statistics

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Find the lower quartile (Q1) for the data: 15, 20, 25, 30, 35, 40, 45, 50, 55, 60.

A25

B20

C22.5

D27.5

✓ Correct Answer: A — 25

n = 10. Q1 position = (10+1)/4 = 2.75th term. Standard SEE method uses (n+1)/4. Q1 ≈ 3rd term = 25 (or interpolation). In discrete lists, we often take the nearest integer or specific formula.

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Find the lower quartile (Q1) for the data: 15, 20, 25, 30, 35, 40, 45, 50, 55, 60.

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