A qualitative variable with three classes (X, Y, and Z) is measured for each of 20 units randomly sampled from a target population. The data (observed class for each unit) are listed below.

a. Compute the frequency for each of the three classes.
b. Compute the relative frequency for each of the three classes.
c. Display the results, part a, in a frequency bar graph.
d. Display the results, part b, in a pie chart.

Transcribed Image Text:

Y X X Z X Y Y Y x x z X Y Y X Z YYYX