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| A | 2.1 | Use software to produce the two- and more- variable graphics such as: |
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| | - scatterplot |
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| | - letterplot |
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| | - multiple box plot |
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| | - scatterplot matrix |
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| C | 2.2 | Describe the features of a relationship as revealed by these plots: number of subgroups, outliers, functional relationships, patterns in the spread. |
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| A | 2.3 | Use regression software to fit functions to data, find and plot residuals, and calculate r squared and r. |
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| C | 2.4 | Assess the appropriateness of these fits, and interpret the statistics. |
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| A | 2.5 | Use software to make two-way frequency tables. |
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| R | 4.1 | List the sources of data (experiment, survey (census or sample), or administrative records). |
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| R | 4.2 | Explain the ways in which errors can arise in statistical data, and the methods of maintaining data quality. |
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| C | 4.3 | Explain the advantages and disadvantages of random sampling. |
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| C | 4.4 | Explain how estimates from random samples have a sampling error which is measured by their standard error, and apply this to market research surveys. |
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| R | 4.5 | Describe the techniques used for sampling business transactions such as: |
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| | - invoices |
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| | - credit notes |
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| | - cheques paid |
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| | - cash received |
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| | - journal entries |
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| C | 4.6 | Explain the difference between the results of studies involving: |
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| | - random samples |
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| | - population or non-random samples. |
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| A | 5.1 | Use the "business graphics" feature of some common packages, and assess their usefulness as tools for graphical statistical data exploration. |
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| A | 5.2 | State some principles for Quality in Data Graphics, and apply these to data graphics from packages and from newspapers, magazines and television. |
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| C | 5.3 | Outline current developments in computer tools for statistics, such as interactive data graphics and statistical expert systems. |
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| C | 5.4 | Outline the computer-based methods used by the Department of Statistics for publishing official statistics (INFOS & press releases, PC-INFOS on floppy disks, fax, etc.). |
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| Note |
| > | The use of simple graphics software is STRONGLY recommended. Students should then report on what the data says. Students should NOT spend time calculating or diagramming by hand. |
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| SUGGESTED TEXT |
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| > | A book of tutor notes is available from Wellington Polytechnic on paper, DG tape or MS-DOS floppy disk. 30 exercises with Minitab are also available. |
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| OTHER RESOURCES: |
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| > | Data - "The Data Bundle" from NZ Statistics Association, Box 1731, Wellington |
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| | Software - Data General: Minitab |
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| | - MS-DOS: Minitab (*) |
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| | Dept. of Statistics PC-INFOS (*) |
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| | Professional packages such as Statgraphics, Systat etc. |
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| | - Apple Mac: Data Desk Professional |
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| (*) | recommended as being the most useful at present. |