Objective

By the end of this lesson, you will be able to collect and analyze data related to dogs, using statistics concepts such as tally charts, bar graphs, and mean.

Materials and Prep

• Paper or notebook
• Pencil or pen

Before starting the lesson, make sure you have a basic understanding of tally charts, bar graphs, and mean.

Activities

1. Create a Tally Chart

Think about different dog breeds and ask your family, friends, or neighbors about their favorite dog breeds. Create a tally chart to record the number of times each breed is mentioned. Use tally marks for each mention, and group them in sets of five for easier counting.

2. Construct a Bar Graph

Using the data from your tally chart, transfer the information to a bar graph. Each breed will be represented by a bar, and the height of the bar will correspond to the number of mentions. Label the x-axis with the dog breeds and the y-axis with the number of mentions.

3. Calculate the Mean

Calculate the mean (average) number of mentions for all the dog breeds. Add up the number of mentions for each breed and divide it by the total number of breeds. Round your answer to the nearest whole number.

Fourth Grade Talking Points

• "Today, we are going to explore statistics, which is a branch of mathematics that deals with collecting, organizing, analyzing, and interpreting data."
• "We will be focusing on data related to dogs, as I know you are interested in them. We will collect information about different dog breeds and use statistics concepts to represent and analyze the data."
• "To start, we will create a tally chart. A tally chart is a way to keep track of data by using tally marks. Each tally mark represents one mention of a dog breed, and we group them in sets of five for easier counting."
• "Once we have our tally chart, we will transfer the data to a bar graph. A bar graph uses bars to represent different categories and their corresponding values. In our case, each dog breed will have a bar, and the height of the bar will show the number of mentions."
• "Finally, we will calculate the mean, which is a measure of central tendency. It tells us the average number of mentions for all the dog breeds we collected data on. To find the mean, we add up the number of mentions and divide it by the total number of breeds."