- Remember, you are given the data set, so you can use your calculator to help you create the boxplot....
- However, it would be a good idea to first get the 5 number summary (1 Var Stats) and try to create the boxplot entirely by hand, first. (Then use the calc to check your answer). You will definitely have to make a boxplot on your test next week, and you may not have all the data (so you'll have to know how to do it by hand!)
- When you describe each distribution, same as before: SOCS! And remember to use the "appropriate summary statistics" (since we have all of the data)!
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Here's my tentative plan for next week--my plans are always subject to change :)
Monday: Groupwork! (Matching boxplots, reading boxplots)
- Here's Monday's homework in case you want a head start: page 92: 13, 19, 23, 31
Tuesday: Notes: (comparing boxplots, ogives)
Wednesday: Wrapup ogives, comparing boxplots; chapter 6 notes
Thursday: Chapter 5 vocab quiz, standard deviation (notes)
Friday: Test: chapters 2-5 (everything so far!)
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Weekend Homework: Boxplots!
1.) The composition of the earth’s atmosphere may have changed over time.
To try to discover the nature of the atmosphere long ago, we can examine the
gas bubbles inside ancient amber. Amber is tree resin that has hardened and
been trapped in rocks. The gas in bubbles within amber should be a sample of
the atmosphere at the time the amber was formed. Measurements on 9 specimens of
amber from the late Cretaceous era (75 to 95 million years ago) give these
percents of nitrogen:
63.4, 65, 64.4, 63.3, 54.8, 64.5, 60.8, 49.1, 51
a.) Sketch a boxplot (appropriately labeled)
using the data above. Be sure to show all work.+
b.) Describe the distribution of percentage of nitrogen for 9 specimens of
amber shown above—in CONTEXT!
2.) Charles Darwin, author of On the Origin of Species (1859), designed an
experiment to compare the effects of cross-fertilization and self-fertilization
on the size of plants. He planted pairs of very similar seedling plants, one
self-fertilized and one cross-fertilized, in each of 15 pots at the same time.
After a period of time, Darwin measured the heights (in inches) of all the
plants. The data below show the heights for the cross-fertilized plants:
23.5, 12, 21, 22, 19.1, 21.5, 22.1, 20.4, 18.3, 21.6, 23.3, 21, 22.1,
23, 12
a.) Sketch a boxplot (appropriately labeled) using the
data above. Be sure to show all work.
b. ) Describe the distribution of heights of cross
fertilized plants shown above—in CONTEXT!
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