Measure of Spread/Variability

- is a descriptive measure that describes how widely dispersed the data are in a given data set. 

Range

- the difference of the highest and the lowest data in a data set.

Variance

- is a quantity describing how dispersed the data are from the mean.

To solve for the variance, we need to solve the mean first.By using the formula of mean, the mean is computed to be 33.

Solving for the variance:

Standard Deviation

- is the positive square root of the variance of a given data set.