Circle Graphs and Percentage Calculations

The video tutorial introduces circle graphs, a type of univariate data visualization, and explains their advantages in comparing parts to a whole. It covers how to calculate central angles using percentages and provides examples. The tutorial also demonstrates constructing a circle graph with a protractor and includes practical exercises to reinforce learning.

What type of data involves observations on a single characteristic?

• Multivariate data

• Univariate data

• Bivariate data

• Qualitative data

Which of the following is NOT a univariate data display?

• Circle graph

• Histogram

• Dot plot

• Scatter plot

What is the main difference between univariate and bivariate data?

• Univariate involves one variable, bivariate involves two

• Both involve one variable

• Both involve two variables

• Univariate involves two variables, bivariate involves one

What is a key advantage of using circle graphs?

• They compare parts to the whole

• They show relationships between variables

• They display frequency distributions

• They show trends over time

How many degrees are in a complete circle?

• 90 degrees

• 360 degrees

• 180 degrees

• 270 degrees

If a section of a circle graph represents 40% of the data, how many degrees does it cover?

• 72 degrees

• 90 degrees

• 180 degrees

• 144 degrees

What is the central angle for a section representing 18% of a circle graph?

• 54 degrees

• 90 degrees

• 65 degrees

• 72 degrees

How do you calculate the central angle for a percentage in a circle graph?

• Add the percentage to 360

• Subtract the percentage from 360

• Multiply the percentage by 360

• Divide the percentage by 360

What tool is useful for measuring angles when constructing a circle graph?

• Ruler

• Compass

• Protractor

• Calculator

In a survey, 38% of students chose Sprite as their favorite soda. How many degrees does this represent in a circle graph?

• 90 degrees

• 144 degrees

• 180 degrees

• 137 degrees