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- 2. NEW IN CLASS? Send me an email to the following address: susanne.saral@okan.edu.tr DR SUSANNE HANSEN SARAL
- 3. Activation of piazza.com account Enter your first and last name Select : Undergraduate Select : Economy
- 4. Organizing categorical data Categorical data produce values that are names, words or codes, but not real
- 5. The Frequency and relative frequency - Distribution Table Summarizing categorical data A frequency table organizes data
- 6. Contingency table another type of frequency table Contingency tables list the number of observations for every
- 7. Contingency table A larger retailer of electronics conducted a survey to determine consumer preferences for various
- 8. Three Rules of Data Analysis Rule 1, 2 and 3: Make a picture of the data
- 9. Bar Chart – Hospital patients DR SUSANNE HANSEN SARAL, SUSANNE.SARAL@GMAIL.COM Hospital Number Unit of Patients Cardiac
- 10. Pie Chart – Hospital patients DR SUSANNE HANSEN SARAL, SUSANNE.SARAL@GMAIL.COM (Percentages are rounded to the nearest
- 11. Bar-chart Number of visits to OKAN University website
- 12. Pie-chart Number of visits to OKAN University website
- 13. Graphing Multivariate Categorical Data MULTIVARIATE= MORE THAN ONE VARIABLE Why multivariate? We are investigating more than
- 14. Graphing Multivariate Categorical Data
- 15. Graphing Multivariate Categorical Data Side by side horizontal bar chart DR SUSANNE HANSEN SARAL, SUSANNE.SARAL@GMAIL.COM (continued)
- 16. Graphing Multivariate Categorical Data Stacked bar chart DR SUSANNE HANSEN SARAL, SUSANNE.SARAL@GMAIL.COM (continued)
- 17. Class exercise The following raw data show responses to the question “What is your primary source
- 18. Class exercise A cable company surveyed its customers and asked how likely they were to bundle
- 19. Week 2 (2) How to organize and illustrate numerical data DR SUSANNE HANSEN SARAL EMAIL: SUSANNE.SARAL@OKAN.EDU.TR
- 20. Classification of Variables DR SUSANNE HANSEN SARAL Examples: # of goals in a football match #
- 21. Numerical/quantitative Data Histogram Frequency Distributions and Cumulative Distributions Tables and Graphs to Describe Numerical Variables DR
- 22. Enron Corporation - energy trading company Energy trading company from 1985 – 2001 (then went bankrupt):
- 23. Enron Corporation - energy trading company Energy trading company from 1985 – 2001: Were there any
- 24. Enron Corporation - energy trading company Energy trading company from 1985 – 2001: Were there any
- 26. Enron Corporation – frequency distribution
- 28. Why Use Frequency Distributions and graphs for numerical data? A frequency distribution is a way to
- 29. Frequency Distributions What is a Frequency Distribution for numerical data? A frequency distribution is a table
- 30. Frequency Distributions for numerical data Intervals for numerical data are not as easy to identify as
- 31. Raw data (sample of 110 employees in a production plant) Completion Times of a particular task
- 32. How to determine the number of intervals/classes A quick guide Sample size Number of intervals Fewer
- 33. How to determine the interval width Each class/interval grouping has to have the same width Determine
- 34. Employee completion time 110 employees’ time have been recorded and the plant supervisor needs to report
- 35. Employee completion time DR SUSANNE HANSEN SARAL, SUSANNE.SARAL@GMAIL.COM
- 36. Employee completion time Completion time (in seconds) Frequency Relative frequency % 220 – 229 5 4.5
- 37. Histogram of employee completion times Absolute frequency DR SUSANNE HANSEN SARAL, SUSANNE.SARAL@GMAIL.COM
- 38. Histogram of employee completion times Relative frequency same graph as absolute frequency DR SUSANNE HANSEN SARAL,
- 39. Employee completion time Cumulative frequency DR SUSANNE HANSEN SARAL, SUSANNE.SARAL@GMAIL.COM
- 40. Histogram – Absolute frequency Enron: Change in stock price DR SUSANNE HANSEN SARAL, SUSANNE.SARAL@GMAIL.COM
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