Question

data is often displayed using numbers and categories

which types of graphs are most appropriate for displaying categorical data? check all of the boxes that apply.
bar graphs
histograms
pie charts or circle graphs
stem-and-leaf plots

an analyst is creating a graph to show the salaries of 200 employees.

which type of graph would best display this information?
( ) a histogram
( ) a stem-and-leaf plot
( ) a bar graph

Explanation:

Analyze the data type

Using the Categorical Data Representation and Types of Graphs knowledge points

The analyst wants to display the salaries of 200 employees. Salary is a continuous numerical variable.

Evaluate the graph options

Using the Types of Graphs knowledge point

• Histogram: Designed specifically for continuous numerical data grouped into intervals (bins). It is ideal for showing the distribution of a large dataset like 200 salaries.
• Stem-and-leaf plot: Best for small numerical datasets because listing individual digits becomes cluttered and impractical for 200 data points.
• Bar graph: Used for categorical data, not continuous numerical data.

Determine the best choice

Using the Types of Graphs knowledge point

A histogram is the most appropriate graph to display the distribution of 200 employee salaries.

Answer:

• a histogram (Correct answer)
• a stem-and-leaf plot
• a bar graph