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Comparative Analysis from Graphs and Diagrams

Comparative Analysis from Graphs and Diagrams. Mary Dwyer Wolfe, Ph.D. Macon State College For MSP with Bibb County March 26, 2011. How Well Do You Understand the Graphical Representation?. Stem-and-Leaf Plot. a). 17 b). 29 c). 4. Histograms. 450 radios CDs, Radios DVDs.

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Comparative Analysis from Graphs and Diagrams

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  1. Comparative Analysis from Graphs and Diagrams Mary Dwyer Wolfe, Ph.D. Macon State College For MSP with Bibb County March 26, 2011

  2. How Well Do You Understand the Graphical Representation?

  3. Stem-and-Leaf Plot

  4. a). 17 b). 29 c). 4

  5. Histograms

  6. 450 radios CDs, Radios DVDs

  7. The distribution is nearly symmetric, so the mean is near the center – near 70 or just slightly higher.

  8. Information about Means and Medians of Differently Skewed Distributions. The mean is more effected by outliers than the median is.

  9. (ii) and (iv) are not possible. How do we choose between (i) and (iii) ? It is (iii) because the median has to be close to 5 since half of the data between 5 and 6.

  10. (iv) seems the most reasonable response. Why?

  11. (d) and (2) and (3) (c) and (4) (b) and (1)

  12. I has a greater standard deviation than II.

  13. Dotplot

  14. Dotplot Answer: C

  15. Ogive

  16. Ogive Answer: B

  17. Ogive Answer: B

  18. Box Plotor Box-and-Whisker Plot

  19. Box-and-Whisker Plot [70, 110, 5]

  20. Box-and-Whisker Plot (e) The female students have less variability.

  21. Box-and-Whisker Plot A or B? Why?

  22. (e) is the solution. Why?

  23. Box-and-Whisker Plot • What other questions could we ask about this plot?

  24. Modified Box Plot

  25. Modified Box Plot • Explanation from TI Inspire web site:

  26. Next slide for explanation. Remove for discussion!

  27. Remove for discussion!

  28. Graphs of Regression Lines

  29. Removing what data point would have the most impact on a linear regression line?

  30. Removing what data point would have the most impact on a linear regression line?

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