Short Answer

1. Why would a researcher want to make a table?
Ans: One of the reasons why a researcher makes a table is to present more precise values that a graph typically will not.
Learning Objective: 6-2: How do I choose the best way to present my data?
Cognitive Domain: Comprehension
Answer Location: Descriptive Statistics in Graphs

2. Why would a researcher want to make a graph?
Ans: One of the reasons why a researcher makes a graph is to present data visually. It helps to show the shape of a data distribution.
Learning Objective: 6-2: How do I choose the best way to present my data?
Cognitive Domain: Comprehension
Answer Location: Descriptive Statistics in Graphs

3. When is a pie chart the best way to present data?
Ans: Pie chart is best used when the data are categorical variables.
Learning Objective: 6-3: What are the differences between pie charts, bar graphs, and line graphs?
Cognitive Domain: Comprehension
Answer Location: Which Measure of Variability Should I Use?