Catch-can test: what does the lowest quartile refer to?

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Multiple Choice

Catch-can test: what does the lowest quartile refer to?

Explanation:
Quartiles divide a set of measurements into four equal parts from smallest to largest. The lowest quartile is the bottom 25% of those measurements—the cans that show the smallest outputs. In a catch-can test, you’re ranking each can’s measured output, so the lowest quartile refers to the quarter with the smallest values. The top quartile would be the largest 25%, the middle half is the central 50% (the second and third quartiles), and the average is the mean, not a quartile.

Quartiles divide a set of measurements into four equal parts from smallest to largest. The lowest quartile is the bottom 25% of those measurements—the cans that show the smallest outputs. In a catch-can test, you’re ranking each can’s measured output, so the lowest quartile refers to the quarter with the smallest values. The top quartile would be the largest 25%, the middle half is the central 50% (the second and third quartiles), and the average is the mean, not a quartile.

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