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Dot plot entitled ‘Maximum temperatures, Rolleston’, with a horizontal axis of temperature (degrees Celsius) ranging from 17 to 21 degrees. Lower quartile is indicated by an arrow on the dot at 18.1°C. Upper quartile is indicated by an arrow on the dot at 19.6°C. Median is indicated by an arrow at 18.75°C halfway between the dots at 18.7 and 18.8.