Scatter Plots and Box Plots | Six Minutes: Praxis Core Math, Part 12
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Scatter Plots and Box Plots | Six Minutes: Praxis Core Math, Part 12
4 просмотра · 8 дн. назад
Six Minutes
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4 просмотра · 8 дн. назад
Six Minutes: Praxis Core Math, Part 12: Scatter Plots and Box Plots: Read trends, clusters, and outliers; then Box Plots
Learn to read a scatter plot in three passes: overall trend, clusters, and outliers. Includes an original worked example checked two ways and the classic outlier trap. Then: Learn to read the five-number summary from a box plot and compute the interquartile range. Then compare two box plots on the same scale to judge which data set is more consistent.
Chapters
0:00 Introduction
0:20 Read the trend
0:51 Clusters and outliers
1:18 Worked example
2:06 Trap
2:23 Recap
2:37 Box Plots
2:48 The five numbers
3:10 Reading a plot
3:40 Comparing two plots
4:05 Worked example
4:49 Trap
5:13 Recap
5:31 Thanks for watching
Practice problems
1. A scatter plot of study hours vs. quiz score shows dots rising left to right, with one dot at 8 hours and a very low score. What is the association, and which dot is the outlier? Answer: positive association; the dot at 8 hours with the low score.
2. A plot of daily temperature vs. hot cocoa sales shows dots falling left to right. Is the association positive or negative? Answer: negative.
3. A box plot of plant heights shows min 8, Q1 14, median 19, Q3 22, max 30. What is the interquartile range? (Answer: 8)
4. A box plot shows Q1 = 10 and Q3 = 18. What percent of the data lies between 10 and 18? (Answer: 50%)
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The narrator's voice is synthetic (computer-generated).
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