Which of the following measures is not a measure of spread? A) Variance B) Standard deviation C) Interquartile range D) Median

In statistics dispersion (also called variability scatter or spread ) is the extent to which a distribution is stretched or squeezed. Common examples of measures of statistical dispersion are the variance standard deviation and interquartile range .

Robust measures of scale - Wikipedia

Average absolute deviation - Wikipedia

Statistical dispersion - Wikipedia

Average absolute deviation - Wikipedia

In statistics a robust measure of scale is a robust statistic that quantifies the statistical dispersion in a set of numerical data.The most common such statistics are the interquartile range (IQR) and the median absolute deviation (MAD). These are contrasted with conventional measures of scale such as sample variance or sample standard deviation which are non-robust meaning greatly ...

Interquartile range test for normality of distribution. The IQR mean and standard deviation of a population P can be used in a simple test of whether or not P is normally distributed or Gaussian.If P is normally distributed then the standard score of the first quartile z 1 is −0.67 and the standard score of the third quartile z 3 is +0.67.Given mean = X and standard deviation = σ ...

Sat Oct 18 2003 14:30:00 GMT-0400 (Eastern Daylight Time) · The average absolute deviation (AAD) of a data set is the average of the absolute deviations from a central point.It is a summary...