Author Archives: Steven J Campbell

Hypothesis Test for a Single Proportion

A Hypothesis test for a single proportion¬†is used to see if a sample is reflective of the whole population or is a new proportion must be established for a known value. (Example) Can be used to compare a data set with a known value or null hypothesis. Used when a success/failure is easily applied to […]


The Mean is measure of central tendency, calculated by the sum of all the data points divided by the number of data points. It is generally referred to as the “average.” The mean is used to compute the average value (not middle or most common value) of a data set. The two means used in […]


The Boxplot or Box and Whisker Plot is a graph that is used to show the range data and where the outliers are expected to arise. The box section is the portion of the data between quartile 1 and quartile 3. There is generally a line inside the box, but not necessarily at the center, […]