Mode: Data are qualitative or categoric.
Median: Quantitative data with outliers - particularly if the distribution is skew.
Mean: Quantitative data without outliers, or else approx symmetrical.
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In fact, there are usually several measures of central tendency used: each of them is a median but these are calculated separately for men, for women, for boys, girls, toddlers and babies.
The mean.
60
The central angle of a n-sided regular polygon = 360 degrees / n. Hence, the central angle of a 15-sided regular polygon = 360 degrees / 15 = 24 degrees ============================
They measure 105 degrees each.