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  2. Weighted median - Wikipedia

    en.wikipedia.org/wiki/Weighted_median

    Equal weights should result in a weighted median equal to the median. This median is 2.5 since it is an even set. The lower weighted median is 2 with partition sums of 0.25 and 0.5, and the upper weighted median is 3 with partition sums of 0.5 and 0.25. These partitions each satisfy their respective special condition and the general condition.

  3. Medcouple - Wikipedia

    en.wikipedia.org/wiki/Medcouple

    The actual medcouple is the median of the bottom distribution, marked at 0.188994 with a yellow line. In statistics, the medcouple is a robust statistic that measures the skewness of a univariate distribution. [1] It is defined as a scaled median difference between the left and right half of a distribution.

  4. Median - Wikipedia

    en.wikipedia.org/wiki/Median

    The median of a normal distribution with mean μ and variance σ 2 is μ. In fact, for a normal distribution, mean = median = mode. The median of a uniform distribution in the interval [a, b] is (a + b) / 2, which is also the mean. The median of a Cauchy distribution with location parameter x 0 and scale parameter y is x 0, the location parameter.

  5. Weight function - Wikipedia

    en.wikipedia.org/wiki/Weight_function

    A weight function is a mathematical device used when performing a sum, integral, or average to give some elements more "weight" or influence on the result than other elements in the same set. The result of this application of a weight function is a weighted sum or weighted average .

  6. Trimean - Wikipedia

    en.wikipedia.org/wiki/Trimean

    For context, the best single point estimate by L-estimators is the median, with an efficiency of 64% or better (for all n), while using two points (for a large data set of over 100 points from a symmetric population), the most efficient estimate is the 27% midsummary (mean of 27th and 73rd percentiles), which has an efficiency of about 81% ...

  7. Weighted arithmetic mean - Wikipedia

    en.wikipedia.org/wiki/Weighted_arithmetic_mean

    The notion of weighted mean plays a role in descriptive statistics and also occurs in a more general form in several other areas of mathematics. If all the weights are equal, then the weighted mean is the same as the arithmetic mean .

  8. Best equal-weight index funds - AOL

    www.aol.com/finance/best-equal-weight-index...

    Equal-weight funds hold an equal proportion of each stock that makes up an index, which translates into a roughly 0.2 percent holding for each company in the S&P 500, for example.

  9. Winsorized mean - Wikipedia

    en.wikipedia.org/wiki/Winsorized_mean

    A winsorized mean is a winsorized statistical measure of central tendency, much like the mean and median, and even more similar to the truncated mean.It involves the calculation of the mean after winsorizing — replacing given parts of a probability distribution or sample at the high and low end with the most extreme remaining values, [1] typically doing so for an equal amount of both ...