What is the formula for calculating sample standard deviation?
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What is the average temperature in degrees Celsius for the past week, given the following daily temperatures: 15°C, 18°C, 21°C, 20°C, 17°C, 16°C, and 19°C?
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What is the measure of the angle formed by the angle bisector when two lines intersect, given that the adjacent angles are 40 degrees and 60 degrees?