We can get the numerical summary through measures of central tendency, location, and variability for numerical data. But numbers…
Variance represents the average of the squared deviations from the mean. Because we square the deviations, the variance is…
In previous article we discussed about variance and standard deviation, assuming we had a population of data, even though…
A straightforward solution to deal with unit of variance which is in squared units is to simply calculate the…
One of the way to measure the variability is to calculate the difference of each observation from the mean.…
One issue with range and the interquartile range (IQR) both is that they don’t include information from all the…
Imagine you’re a teacher assessing student performance in a math exam where scores range from 0 to 100. You’ve…
We have covered major measures of center and location—mean, median, and mode—we now turn to other important measures: percentiles…