Statistics MCQs, Data Analysis, Stat Software
The measure of dispersions, variance, standard deviation, quantile deviation, absolute measures of dispersion, relative measure of dispersion, range, deviations, multivariate measures of dispersions
Moments in Statistics The measure of central tendency (location) and the measure of dispersion (variation) both are useful to describe a data set but both of them fail to tell anything about the shape of the distribution. We need some other certain measure called the moments. Moments in Statistics are …
In statistics, a measure of kurtosis is a measure of the “tailedness” of the probability distribution of a real-valued random variable. The standard measure of kurtosis is based on a scaled version of the fourth moment of the data or population. Therefore, the measure of kurtosis is related to the …
Lack of Symmetry Skewness is the lack of symmetry (lack of normality) in a probability distribution. The skewness is usually quantified by the index as given below $$s = \frac{\mu_3}{\mu_2^{3/2}}$$ where $\mu_2$ and $\mu_3$ are the second and third moments about the mean. This index formula described above takes the …