📝 Practice Worksheets
🔑 Key Concepts
- A box and whisker plot is built from a five-number summary: minimum, Q1, median, Q3, and maximum.
- To match a data set to a box plot, first organize the data and find the five-number summary.
- When a data set has an even number of values, the median is found by looking at the two middle values.
- Each quartile represents 25% of the data, even if the sections of the box plot have different widths.
- You can estimate percentages on a box plot by identifying which quartile a value falls in and reasoning about how much of that quartile is included.
💡 Main Idea
This lesson shows students how to connect a numerical data set to its visual representation on a box and whisker plot. The video begins by creating a five-number summary from a table of ordered data, then uses those values to determine which box plot is correct. It also explains how quartiles divide the data into four equal parts and how that idea can be used to estimate what percent of a group scored at least or at most a certain value.
📚 What You Should Already Know
Before watching this lesson, students should be comfortable reading number lines, ordering data values, and finding the median of a set of numbers. It also helps if they already understand that a quartile divides data into sections and that the median separates a data set into two halves.
🚀 What Comes Next
After this lesson, students can move on to creating their own box plots from raw data, comparing two box plots, and interpreting spread using ideas such as range and interquartile range. This understanding also prepares students to analyze distributions and make comparisons between different groups of data.
🧩 Embed This Video in Your LMS
Teachers can embed this YouTube video directly into Canvas, Google Classroom, Schoology, or another learning platform. Click below to show the embed code.