When analyzing distributions, we often discuss their modalities. The modalities is the number of peaks they exhibit. A distribution…

If you have a sample or population of data and you want to understand the different properties, the different…

Previous article discussed the basic contingency table of proportions and percentages. People often want to ask more about relationships…

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…

The Challenger disaster occurred on January 28, 1986, during the launch of the Space Shuttle Challenger. The Space Shuttle…