Displaying Data - AFDA

Lesson 8.3

Displaying Data

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Open Ended

What is an example of CATEGORICAL Data (non-numbers)?

Open Ended

What is an example of QUANTITATIVE Data (numbers)?

Graphs for Categorical Data

• Bar Graph

• Pictogram

• Circle Graph/Pie Chart

Bar Graph

A bar graph is typically drawn on a horizontal and vertical axis; often the count is on the vertical axis and the categories are names on the horizontal axis.

Pictogram

A pictogram can be created in a few ways. Use images as a tally system wish complete or partial images.

Circle Graph or

Pie Chart

A circle graph, often referred to as a pie chart, is created by dividing a circle into sections that represent the percent of the total for each category.

Graphs for Quantitative Data

• Histogram

• Dot Plot

• Box Plot

Histogram

A histogram is similar to a bar graph, but there are some key differences. First, instead of count and category, the axes show count and a number line marked at equal intervals. Each bar is a histogram represent how many data points lie between the numbers at the left and right boundaries.

Dot Plot

A dot plot shows every data point in the data set. This is shown on a number line, either with dots or with X's. A dot plot can show us the shape of the distribution as you quickly plot each number. You are able to see gaps in the data and where there might be possible outiers (numbers that don't fit).

Box Plot/Box and Whisker Plot

A box plot is used as a way to quickly look at the spread and general shape of a data set. These graphs show how the data is spread out and where the center (median) lies.

A box plot is created by plotting 5 critical point: the lowest point, the first (lower) quartile, the median(middle), the third (upper) quartile, and the highest point.

Multiple Select

Which graphs would be best to represent Categorical data?

• Bar Graph

• Pictogram

• Circle Graph or Pie Chart

• Histogram

• Dot Plot

Multiple Select

Which graphs would be best to represent Quantitative data?

• Bar Graph

• Box and Whisker Plot

• Circle Graph or Pie Chart

• Histogram

• Dot Plot

Multiple Choice

Name this graph!

• Box and Whisker Plot

• Dot Plot

• Histogram

• Circle Graph

• Bar Graph

Multiple Choice

Name this graph!

• Box and Whisker Plot

• Dot Plot

• Histogram

• Circle Graph

• Bar Graph

Multiple Choice

Name this graph!

• Box and Whisker Plot

• Dot Plot

• Histogram

• Circle Graph

• Bar Graph

Multiple Choice

Name this graph!

• Box and Whisker Plot

• Dot Plot

• Histogram

• Circle Graph

• Bar Graph

Multiple Choice

Name this graph!

• Box and Whisker Plot

• Dot Plot

• Histogram

• Circle Graph

• Bar Graph

Multiple Choice

Name this graph!

• Box and Whisker Plot

• Dot Plot

• Pictogram

• Circle Graph

• Bar Graph

Describing Graphs of Quantitative Data

We want to talk about 3 things:

1.The Shape

2.The Spread

The Shape

• Unimodal: There is one "mound" or one peak in the data.

• Bimodal: There are two seperate "mounds" or two peaks in the data.

• Uniform: The data is relatively level

The Spread

• Symmetric: The data can be split approximately in the middle and both sides will look the same.

• Right Skewed: There is a peak on the left and the "tail" on the right extreme

• Left Skewed: There is a peak on the right and the "tail" on the left extreme

Multiple Select

Select all that describe this graph.

• Unimodal

• Bimodal

• Skewed right

• Skewed left

• Symmetric

Multiple Select

Select all that describe this graph.

• Unimodal

• Bimodal

• Skewed right

• Skewed left

• Symmetric

Multiple Select

Select all that describe this graph.

• Unimodal

• Bimodal

• Skewed right

• Skewed left

• Symmetric

Multiple Select

Select all that describe this graph.

• Unimodal

• Bimodal

• Skewed right

• Skewed left

• Symmetric

Multiple Select

Select all that describe this graph.

• Unimodal

• Bimodal

• Uniform

• Skewed left

• Symmetric