Dot Plots

• uses a number line and dots or (x)s to represent numerical data (sometimes called line plot)

• individual data points are represented​

Reading a Dot Plot graph...

• Identify the title

• Identify the scaled interval

• Label the value of the data

​Answer the questions in the slides to test your understanding of reading data from a dot plot graph...

What is a Histogram?

• A Histogram is a graph that represents a large data set

• The data has a wide range (it is very spread out)

• There is not much repetition in the data

• The bars in a histogram are called bins.

• Each bin represents a range of data like 0-4, 5-9, 10-14 etc.

• No individual data points can be determined from a histogram

Histograms are NOT Bar Charts!

Histograms can only be used to represent QUANTITATIVE data. Bar charts are only good for representing QUALITATIVE data.

What is represented on the x-axis?

What is represented on the y-axis?

Five Number Summary of Data

Prep for Box-And-Whisker Plots

Stem and Leaf Plot

• Used when data is spread out and there is not much repetition in the data

• The Leaf only shows the ones place

• The Stem can show the tens and hundreds place values

• Every data point can be seen on a Stem and Leaf Plot