Cumulative Frequency Curves
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Lesson Summary:
In this intermediate lesson on cumulative frequency curves, the instructor explains how to plot a cumulative frequency curve from a frequency distribution. The lesson covers how to find the cumulative frequencies, write upper glass boundaries, plot the curve, and find the median, upper and lower quartiles, and inter-cortile range. With examples and clear explanations, this lesson is a great resource for those looking to deepen their understanding of frequency distributions and data analysis.
Lesson Description:
Intermediate screencast on plotting a cumulative frequency curve from the frequency distribution.
Questions answered by this video:
- What is a cumulative frequency curve?
- How do you calculate the cumulative frequencies of a data set?
- What are the upper class boundaries for each interval of a data set?
- How do you plot the cumulative frequency curve for a data set?
- How do you find the median value for a data set from a cumulative frequency curve?
- How do you find the upper and lower quartiles for a data set and what do quartiles mean?
- How do you find the inner-quartile range for a data set and what does it mean?
- What should a cumulative frequency curve look like?
- What does the inner-quartile range tell you about a data set?
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Staff Review
This lesson goes step by step through a cumulative frequency curve for a data set. All parts of this method are explained and shown clearly and slowly. This is a wonderful tutorial to learn the basics of this method of plotting a cumulative frequency curve and finding values from the curve.
