dot plot


Definition of Dot plot

  • In a Dot Plot, a set of data is represented by using dots over a number line.

More about Dot plot

  • The number of dots over the number line tells the value of the data points.

Example of Dot plot

  • A dot plot is as shown in the figure.
    The frequency of the data points is represented by the dots.

Solved Example on Dot plot

The number of various kinds of snakes found in a zoo is shown in the dot plot. What is the total number of snakes in the zoo?

Choices:
A. 29
B. 25
C. 30
D. 34
Correct Answer: A
Solution:
Step 1: The number of snakes of a particular kind in the zoo is indicated by the number of dots above the name of the snake in the dot plot.
Step 2: From the plot, the number of Black cobras, Pythons, Anacondas, Rattlesnakes and Green cobras in the zoo are 4, 5, 2, 10 and 8 respectively. [Count the number of dots over each snake name.]
Step 3: The total number of snakes in the zoo = 4 + 5 + 2 + 10 + 8 = 29 [Add the number of snakes of each kind.]
Step 4: So, there are a total of 29 snakes in the zoo.

Related Terms for Dot plot

  • Data
  • Data Points
  • Number Line