enow.com Web Search

  1. Ad

    related to: find sample variance formula in excel template free invoice example

Search results

  1. Results from the WOW.Com Content Network
  2. Variance - Wikipedia

    en.wikipedia.org/wiki/Variance

    If the set is a sample from the whole population, then the unbiased sample variance can be calculated as 1017.538 that is the sum of the squared deviations about the mean of the sample, divided by 11 instead of 12. A function VAR.S in Microsoft Excel gives the unbiased sample variance while VAR.P is for population variance.

  3. Algorithms for calculating variance - Wikipedia

    en.wikipedia.org/wiki/Algorithms_for_calculating...

    This algorithm can easily be adapted to compute the variance of a finite population: simply divide by n instead of n − 1 on the last line.. Because SumSq and (Sum×Sum)/n can be very similar numbers, cancellation can lead to the precision of the result to be much less than the inherent precision of the floating-point arithmetic used to perform the computation.

  4. Unbiased estimation of standard deviation - Wikipedia

    en.wikipedia.org/wiki/Unbiased_estimation_of...

    Since the square root is a strictly concave function, it follows from Jensen's inequality that the square root of the sample variance is an underestimate. The use of n − 1 instead of n in the formula for the sample variance is known as Bessel's correction , which corrects the bias in the estimation of the population variance, and some, but ...

  5. Bessel's correction - Wikipedia

    en.wikipedia.org/wiki/Bessel's_correction

    Firstly, while the sample variance (using Bessel's correction) is an unbiased estimator of the population variance, its square root, the sample standard deviation, is a biased estimate of the population standard deviation; because the square root is a concave function, the bias is downward, by Jensen's inequality.

  6. Statistical dispersion - Wikipedia

    en.wikipedia.org/wiki/Statistical_dispersion

    Common examples of measures of statistical dispersion are the variance, standard deviation, and interquartile range. For instance, when the variance of data in a set is large, the data is widely scattered. On the other hand, when the variance is small, the data in the set is clustered.

  7. Marna C. Whittington - Pay Pals - The Huffington Post

    data.huffingtonpost.com/paypals/marna-c-whittington

    From May 2012 to December 2012, if you bought shares in companies when Marna C. Whittington joined the board, and sold them when she left, you would have a 62.1 percent return on your investment, compared to a 1.5 percent return from the S&P 500.

  8. Sample mean and covariance - Wikipedia

    en.wikipedia.org/wiki/Sample_mean_and_covariance

    The sample covariance matrix has in the denominator rather than due to a variant of Bessel's correction: In short, the sample covariance relies on the difference between each observation and the sample mean, but the sample mean is slightly correlated with each observation since it is defined in terms of all observations.

  9. Edith E. Holiday - Pay Pals - The Huffington Post

    data.huffingtonpost.com/paypals/edith-e-holiday

    From January 2008 to December 2012, if you bought shares in companies when Edith E. Holiday joined the board, and sold them when she left, you would have a -47.1 percent return on your investment, compared to a -2.8 percent return from the S&P 500.

  1. Ad

    related to: find sample variance formula in excel template free invoice example