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Dot plot entitled ‘Differences in sample means’ with a horizontal scale of difference between males and females in kilometres per hour (km/h) from -30 to +40. Dots, representing the difference between sampled male and female points, are clustered around -5, with a range of approximately -27 to +25. The observed difference is indicated by a vertical line at 36.0, well past the edge of the range.

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Last updated September 9, 2010

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