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Variables can either be classified as discrete or continuous. Students of statistics are often taught the definition of these two types of variables in introductory statistics class. In this piece, however, I will be...

You can either classify numeric variables as discrete or continuous. Both these types of variables, discrete and continuous, are taught in introductory statistics classes. However, we will only be discussing discrete variables in detail...

Every business must be aware of the important data that it needs in order to make critical business decisions. In order to forecast the occurrence of uncertain events, previous data are projected into the...

Pretesting a questionnaire refers to the act of testing a questionnaire in a small sample before it is formally handed out to the larger population for data collection purposes. When preparing a questionnaire, the...

Action research is a technique in which a client and an action researcher work together to analyze a problem and build a solution based on the assessment. One of the main aspects of action...

The Taylor series of ln(1+x) gives an expression for the function ln(1+x) expressed as a polynomial power series having infinitely many terms. The series is valid in the range xin (-1,1] . In this...

The Sxx refers to the sum of squares due to the variable x in both linear regression and ANOVA. It basically measures the amount of variation introduced in the data because of the x...

By normalizing the data we mean scaling the given data values in such a way that all of the given data values lie within the range 0 to 1. The data is scaled proportionally...