Stem and leaf plot is used to plot for a numerical variable. It’s essentially a way to list our…
Variance represents the average of the squared deviations from the mean. Because we square the deviations, the variance is…
There are two main kinds of studies, observational studies and, experimental studies. The statistical process can be viewed in…
There is an important distinction between a sample of data and population of data. So, let’s take a research…
Data is set of observation. This observation can be collected in various ways such as field notes, survey or…