Содержание
- 2. Numerical measures to describe data COPYRIGHT © 2013 PEARSON EDUCATION, INC. PUBLISHING AS PRENTICE HALL Ch.
- 3. Interquatile range, IQR Alternative way to calculate the IQR Khan Academy
- 5. Five-Number Summary of a data set DR SUSANNE HANSEN SARAL In describing numerical data, statisticians often
- 6. Five-Number Summary: Example DR SUSANNE HANSEN SARAL minimum 6 Sample Ranked Data: 6 7 8 9
- 7. Exercise Consider the data given below: 110 125 99 115 119 95 110 132 85 a.
- 8. Exercise Consider the data given below. 85 95 99 110 110 115 119 125 132 a.
- 9. Five number summary and Boxplots Boxplot is created from the five-number summary A boxplot is a
- 10. Five number summary and Boxplots Boxplot is created from the five-number summary The central box shows
- 11. Five number summary and boxplot
- 12. Five number summary and boxplot
- 13. Boxplot COPYRIGHT © 2013 PEARSON EDUCATION, INC. PUBLISHING AS PRENTICE HALL Ch. 2- Median (Q2) maximum
- 14. Gilotti’s Pizza Sales in $100s
- 15. Gilotti’s Pizza Sales What are the shapes of the distribution of the four data set?
- 16. Gilotti’s Pizza Sales - boxplot
- 17. Gilotti’s Pizza Sales in $100s
- 18. Measuring variation in a data set that follows a normal distribution COPYRIGHT © 2013 PEARSON EDUCATION,
- 19. Measuring variation in a data set Data set 1 : 23 19 21 18 24 21
- 20. Average distance to the mean: Standard deviation Most commonly used measure of variability Measures the standard
- 21. Calculating the average distance to the mean 2/22/2017
- 22. Calculating the average distance to the mean 2/22/2017
- 23. Calculating the average distance to the mean Notice that the deviation score adds up to zero!
- 24. Calculating the average distance to the mean Step 3: The solution is to get rid of
- 25. Average of squared deviations from the mean Population variance: COPYRIGHT © 2013 PEARSON EDUCATION, INC. PUBLISHING
- 26. Average of squared deviations from the mean Sample variance: COPYRIGHT © 2013 PEARSON EDUCATION, INC. PUBLISHING
- 27. Most commonly used measure of variation in a population Shows variation about the mean in a
- 28. Sample Standard Deviation, s Most commonly used measure of variation in a sample Shows variation about
- 29. Calculation Example: Sample Standard Deviation, s COPYRIGHT © 2013 PEARSON EDUCATION, INC. PUBLISHING AS PRENTICE HALL
- 30. Class example Calculating sample variance and standard deviation DR SUSANNE HANSEN SARAL
- 31. Class example (continued) DR SUSANNE HANSEN SARAL
- 32. Class example (continued) The mean = 7 DR SUSANNE HANSEN SARAL 6 8 7 10 3
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