Question

1. which data representation would be most useful if someone wanted to find the:

measure	data representation
mean
median
interquartile range (iqr)

Explanation:

The mean is best found using a list of all data values as it requires summing all values and dividing by the number of values. The median can be found from an ordered - list of data values. The interquartile range (IQR) is best found from a box - and - whisker plot as it directly shows the first quartile ($Q_1$), the third quartile ($Q_3$), and $IQR = Q_3 - Q_1$.

Answer:

Measure	Data Representation
Median	Ordered list of data values
Interquartile Range (IQR)	Box - and - whisker plot