# Statistics - Data Analysis

Videos, solutions, worksheets, games, and activities to help Grade 3 students learn statistics.

In these lessons, we shall learn how to use

• Tally Charts
• Line Plots
• Bar Charts / Bar Graphs
Related Topics:
Statistics Lessons

### Tally Charts

Gathering data requires an organized system of collecting the information. Using tally marks is a simple way for you to keep track of information as you collect it. Tally marks are most effective when recorded in an organized column chart like the one below. Grouping the tally marks in 5s makes it easier for you to total the numbers in each category by skip counting. Remember to keep your bundles of 5 separate from each other. Tally charts should always be given a title to inform the reader about the meaning of the data.

Using A Tally Chart
How to use a tally chart to record data from a simple survey?

Tally Charts and Frequency Tables
How to make and interpret tally charts and frequency tables?
Example:
1. Mr. Andrew's class got the following scores on a five-word spelling test. The data is given below:
5,3,4,3,1,5,4,4,4,3,2,3,5,5,2,1,5,5,4,0,2
a) Make a tally chart and frequency table to show the data.
b) How many students had 5 words correct?

### Line Plots

Another useful tool for organizing data is the line plot.
The line plot displays each piece of data by marking an ‘X’ (cross) above the corresponding choice/value along a horizontal line, as shown in the following examples.

Example:

In the line plot below:

1. What is the most common type of pet owned by students in Grade 3 ?
2. What is the least common type of pet owned by students in Grade 3 ?
3. How many more dogs are there than birds?
4. How many students in all own pets?

1. Dogs
2. Birds
3. There are 5 more dogs.
4. There are 17 students with pets.

Learn to make and interpret line plots
Example:
The table shows the number of calories contained in one serving of students' favorite cereals.
a) Make a line plot of the data.
b) What is the range of the data?

### Bar Graphs

A bar graph is another useful tool for organizing data. Bar graphs can be vertical or horizontal. The height or length of the bars represents a number and each bar represents a separate category.

How to use a bar graph to plot data as well as answer questions? Examples:
Which color did the most children like?
Which color did the least children like?
How many more children liked red than yellow?
How many children liked red, green and brown?

### Statistics Games

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.