stats_variance

    (PECL stats >= 1.0.0)

    stats_variance — Returns the variance

    说明

    stats_variance(array $a, bool $sample = false): float

    Returns the variance of the values in a.

    参数

    a

    The array of data to find the standard deviation for. Note that all values of the array will be cast to float.

    sample

    Indicates if a represents a sample of the population; defaults to false.

    返回值

    Returns the variance on success; false on failure.

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