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Information and Communications
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| Prescription: ST500 (ST100)Statistical Analysis |
| Aim of Module | To enable students to gain an understanding of basic statistical principles and practice as needed by a non-statistician in a business environment.
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| Credits | 7
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| Student Learning hours | 70
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| Content Revised | pre 1996
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| Prescription Expiry Date | Nov 2005
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The Student Will
| | | | C | 1.1 | Classify variables as qualitative, coded, counted, measured. | | | | | A | 1.2 | Use pencil-and-paper and software to produce one-variable graphics such as: | | | | - dotplot | | | | - histogram | | | | - box plot | | | | | C | 1.3 | Describe the features of a distribution as revealed by these plots: number of subgroups, behaviour at extremes, skewness. | | | | | A | 1.4 | Use software to find the summary statistics, and interpret these. | | |
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| | | | A | 2.1 | Use software to produce the two- and more- variable graphics such as: | | | | - scatterplot | | | | - letterplot | | | | - multiple box plot | | | | - scatterplot matrix | | | | | C | 2.2 | Describe the features of a relationship as revealed by these plots: number of subgroups, outliers, functional relationships, patterns in the spread. | | | | | A | 2.3 | Use regression software to fit functions to data, find and plot residuals, and calculate r squared and r. | | | | | C | 2.4 | Assess the appropriateness of these fits, and interpret the statistics. | | | | | A | 2.5 | Use software to make two-way frequency tables. | | |
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| | | | A | 3.1 | Use software to produce series plots. | | | | | C | 3.2 | Describe the features of the series revealed in the plots: trends, cycles, seasonal effects, residuals. | | |
NOTES TO TUTORS | | | > | PC-INFOS dataset and software from the Department of Statistics would be useful here. | | | | | | A | 3.3 | Use software to do series transformations such as smoothing and deflating. | | | | | | R | 3.4 | Explain what forecasting aims to do, how it is used in budgeting, and some of its pitfalls. | | |
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| | | | R | 4.1 | List the sources of data (experiment, survey (census or sample), or administrative records). | | | | | | R | 4.2 | Explain the ways in which errors can arise in statistical data, and the methods of maintaining data quality. | | | | | | C | 4.3 | Explain the advantages and disadvantages of random sampling. | | | | | | 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. | | | | | | R | 4.5 | Describe the techniques used for sampling business transactions such as: | | | | - invoices | | | | - credit notes | | | | - cheques paid | | | | - cash received | | | | - journal entries | | | | | | C | 4.6 | Explain the difference between the results of studies involving: | | | | - random samples | | | | - 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. | | | | | | 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. | | | | | | C | 5.3 | Outline current developments in computer tools for statistics, such as interactive data graphics and statistical expert systems. | | | | | | 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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| | | | C | | Discuss the range of statistical software available and its role in modern business.
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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. | | | | | | | | | SUGGESTED TEXT | | | | | | > | 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. | | | | | | OTHER RESOURCES: | | | | | | > | Data - "The Data Bundle" from NZ Statistics Association, Box 1731, Wellington | | | | | | Software - Data General: Minitab | | | | - MS-DOS: Minitab (*) | | | | Dept. of Statistics PC-INFOS (*) | | | | Professional packages such as Statgraphics, Systat etc. | | | | - Apple Mac: Data Desk Professional | | | | | (*) | recommended as being the most useful at present. |
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