Question

Enter one word that applies to all the following blanks, starting with 'v'. Spelling counts. Look it up Ch1 Slides if you are not sure. Statistical techniques are useful to describe and understand ____________________. By ____________________, we mean successive observations of a system or phenomenon do not produce exactly the same result.

Answer 1

Variability

Explanation:

Variability in simple terms may be described as differences in measurement or reading of a certain construct or phenomenon. Variability measures include range, standard deviation or variance. In most cases, variation or degree of Variability is measured about a central value called the mean. This is because same measurement about a certain phenomenon or study would usually not yield the same result value. Hence, the mean is used to record the average of these measurement and the differences in each measurement from the mean is also recorded, this is called the standard deviation which is a Variability measure.

Thus VARIABILITY means successive observation of a phenomenon do not yield exactly the same result.