1 / 10

Unit 8: Day 3 Box and Whisker Plots

Unit 8: Day 3 Box and Whisker Plots. Ms. Hall. Too bad this is not a box and whisker plot, but it is a great way to remember it!. What’s the big deal about it?.

percy
Télécharger la présentation

Unit 8: Day 3 Box and Whisker Plots

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Unit 8: Day 3Box and Whisker Plots Ms. Hall

  2. Too bad this is not a box and whisker plot, but it is a great way to remember it!

  3. What’s the big deal about it? • Box and Whisker Plot: a graphic way to display the median, quartiles, and extremes of a data set on a number line to show the distribution of the data. • You can show all the important values. • Quartiles are the values that divide a list of numbers into quarters (4 parts kind of like quadrants).

  4. The Five Number Summary • You need five values in order to draw the box and whisker plot. It’s called “the five number summary”. • The first step is to put the numbers in ascending order from least to greatest. • The second step is to find the median of the entire set (this is quartile 2). • The third step is to find the medians of the two halves (this makes up quartile 1 and 3). • The final step is find the minimum and maximum of the entire set.

  5. Example 1 • 2,5,6,6,8,10,11,12,14 (Find the five number summary)

  6. Now, we can draw! • You want to draw a number line that goes a little above and below your data and label your line with numbers. • Next, you want to draw five small lines or tally marks to represent the five number summary. • The “box” is represent from Q1 to Q3. • The “whiskers” are drawn to the minimum and maximum. 5 6 6 8 10 11 12 14 5.5811.5 2 Q1Q2Q3 14

  7. Interquartile Range • The interquartile range is from Q1 to Q3: • Interquartile Range or IQR = Q3 – Q1 • The interquartile range helps detect outliers which will be talked about in later math classes. Q1 Q2 Q3

  8. Example 2Draw a box and whisker plot for the data below. • 25,15,7,10,4,20,12,16,15,5

  9. Example 3 • Mrs. Sparrow gave her students a math test. Here are their test scores: 85,66,99,80,93,85,78,43,75,96,68,72,82,88,95,90 Draw a box and whisker plot. Find the interquartile range (IQR).

  10. Now it’s your turn to try it on your own. Homework Problem:Easter Egg HuntSuppose 15 kids go to a local Easter egg hunt. Here are the number of eggs they found: 10, 16, 8, 12, 5, 30, 13, 14, 27, 7, 15, 12, 17, 9, 101. Find the five number summary and IQR of the eggs. 2. Now, the kid, who got 14 treats, noticed some leftover eggs as she was walking back which brings her total up to 19 eggs. Does her new total change any of the five number summary or the interquartile range?

More Related