II. Use the grouped frequency distribution below to answer item numbers 19 to 25. Class Interval f 18.2-18.6 17.7-18.1 17.2-17.6 16.7-17.1 16.2-16.6 15.7-16.1 15.2-15.6 14.7-15.1 14.2-14.6 13.7-14.1 13.2-13.6 3 12 18 13 19. The size of the class interval is

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