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- 2. Module Aims: To foster in students confidence to cope with the processing and analyzing of quantitative
- 3. Learning outcomes: apply numerical skills to business and/or engineering problems present statistical data in a variety
- 4. In brief, you will learn how ...: To appreciate benefit of numerical data for businesses To
- 5. Teaching methods: 1-hour online lecture each week (online) 2-hour tutorial each week (offline) 1-hour workshop each
- 6. Assessment methods: Two assessments (or components): In-class test (30%+10%). 30% goes to an in-class test in
- 7. LECTURE 1 DATA & DATA REPRESENTATION Temur Makhkamov Indira Khadjieva QM Module Leaders tmakhkamov@wiut.uz i.khadjieva@wiut.uz Office
- 8. Lecture outline DATA the meaning and types of data sources of data the scales of measurements
- 9. What is data? (1) Data – the facts and figures that are collected, analyzed and summarized.
- 10. What is data? (2) Data may be obtained through already existing-sources or through statistical studies. 1.
- 11. Primary and Secondary data Primary data – the data that are obtained as a result of
- 12. Questions: What data is more costly (expensive): primary or secondary? What data is more reliable (trustworthy):
- 13. Statistical data Q: What are the components of the statistical table?
- 14. Components of the tabular data Element – the entity or item on which data are collected.
- 15. Main types of data Qualitative data provide labels or names for variables. They can be nonnumeric
- 16. Question: Consider this room as an element. Are its variables such as, Names of students quantitative
- 17. Quantitative Data Discrete data – the data obtained as a result of counting. Examples: Number of
- 18. Scale of Measurement
- 19. SM for Qualitative Data (1) Nominal scale – a scale of measurement that uses name or
- 21. SM for Qualitative Data (2) Ordinal scale – a scale of measurement that is nominal and
- 23. SM for Quantitative Data (1) Interval scale – a scale of measurement that is ordinal and
- 25. SM for Quantitative Data (2) Ratio scale – a scale of measurement that is interval and
- 29. Raw data Raw data – the data that has not been processed (analyzed, categorized, put in
- 30. Aggregate data Aggregate data – the data that has already been processed to serve one’s goal.
- 31. Cross-section data – data collected at the same point in time or based on the same
- 32. Population and Sample Population – a collection of all elements of interest in a particular study.
- 33. Part 2. Data representation PART II. Data representation tools and techniques
- 34. Section I Qualitative data: Case 1. Research conducted on 50 individuals’ choice on GM Uzbekistan automobiles.
- 35. Tabular Methods: Frequency and Relative frequency tables
- 36. Graphical Method: Bar graph
- 37. Graphical Method: Pie chart
- 38. Quantitative data: Discrete Case 2. The store sold the following numbers of refrigerators on 30 different
- 39. Tabular Methods: Frequency, relative and cumulative frequency table Range = 23 – 0 = 23; Group
- 40. Tabular Method: Stem-and-Leaf diagram
- 41. Graphical Method: Histogram Histogram
- 42. Graphical Method Cumulative frequency
- 43. Quantitative data: Time series Case 3. the following table shows the profit made by three cotton
- 44. Quantitative data: Time series Times series graph (line graph)
- 45. Quantitative data: Time series Case 4: The company XYZ produces three types of products (A, B,
- 46. Tabular form
- 47. Graphical form Component bar graph
- 48. Graphical form Multiple bar graph
- 49. Graphical Method Scatter graph
- 50. Concluding remarks: Today, you learnt: The components of statistical table; The main types of data; The
- 51. Essential readings (Part 1) Jon Curwin…, “Quantitative Methods…”, Chapters 1-2 Glyn Burton…, “Quantitative Methods…”, Chapter 1
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