Measure of Dispersion

Measures of Dispersion:Advantages/Disadvantages

Let's explore

Range

• Range is the easiest measure of dispersion to calculate but it cannot provide a good view of how data is distributed.

Interquartile Range

• Interquartile range is the more appropriate measure of dispersion to show the distribution of the data in cases where there is an outlier or extreme value.

Standard Deviation

• SD is used to compare two sets of data

• A low SD indicates that the data is dispersed close to the mean

• A high SD indicates that the data is dispersed far from the mean

Fill in the Blanks

Data: 2, 16, 16, 19, 20, 20, 24, 26, 27, 27, 29.

Determine the range.

Fill in the Blanks

Data: 2, 16, 16, 19, 20, 20, 24, 26, 27, 27, 29.

Determine the interquartile range.

Open Ended

Data: 2, 16, 16, 19, 20, 20, 24, 26, 27, 27, 29.

Range :27, Interquartile range:11

Determine which measure of dispersion is more appropriate to be used to measure the distribution of the set of data. Justify your answer.