In my region the temperatures in second and third week of June measured in Celsius scale were
24, 25, 28, 28, 24, 25, 26, 25, 24, 19, 12, 11, 21, 18.
The average of the second week is
(24 + 25 + 28 + 28 + 24 + 25 + 26)/7 = 25.71.
The average of the third week is
(25 + 24 + 19 + 12 + 11 + 21 + 18)/7 = 18.57.
The ratio is 18.57/25.71 = 0.72.
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