statistics.variance()
statistics.variance() is a Python function in the Statistics Module category. Returns the sample variance (n-1 denominator). The syntax is statistics.variance(data, xbar=None). Parameters: data — numbers. Returns: Float. A typical example: statistics.variance([1, 2, 3, 4, 5]) # 2.5. A close sibling is statistics.mean(), which returns the arithmetic mean (average) of numeric data. A close sibling is statistics.median(), which returns the median (middle value) of numeric data. A close sibling is statistics.median_low(), which returns the low median of numeric data (for when there are an even number of values). A close sibling is statistics.median_high(), which returns the high median of numeric data. More about this category: Statistical functions — mean, median, mode, stdev, correlation. For a broader walkthrough, read the Statistics Module guide. Related Statistics Module entries: statistics.mean(), statistics.median(), statistics.median_low(), statistics.median_high(), statistics.mode(), statistics.multimode(). This page is part of the free Python Reference documentation covering 978+ functions, methods, and modules with examples and parameter details.