Available online
Description
This programme introduces the basic statistical ideas and methods of surveys, samples and probabilities.
This programme introduces the basic statistical ideas and methods of surveys, samples and probabilities.
| Module code and title: | M101, Mathematics: a foundation course |
|---|---|
| Item code: | M101; 23 |
| First transmission date: | 26-08-1978 |
| Published: | 1978 |
| Rights Statement: | |
| Restrictions on use: | |
| Duration: | 00:23:49 |
| + Show more... | |
| Producer: | David Saunders |
| Contributors: | Stewart Gartside; Barry Hedges |
| Publisher: | BBC Open University |
| Keyword(s): | Binomial distribution; Histograms; Survey samples |
| Footage description: | Stewart Gartside introduces the programme. He gives some examples of statistical surveys and samples. Barry Hedges of Social and Community Planning Research, discusses sampling and the need to obtain an unbiased sample in order to obtain correct results. Stewart argues that chance must be included in the sampling process. He carries out a small experiment, taking sample of coloured beads, and shows that the sample result may or may not represent the proportion of coloured beads in the collection he is using. Using histograms and animated diagrams he introduces the idea of probability and builds up a sequence of probabilities, the binomial probability distribution. Animated histograms are now used to show the range of possible probabilities in which the sample proportion of .2 is likely to occur, when the total population is unknown. He compares the idea of probabilities with mathematical models, a range of which are likely to give the correct result. Barry Hedges again discusses sample size, survey costs and bias. |
| Master spool number: | 6HT/72730 |
| Production number: | 00525_4261 |
| Videofinder number: | 2485 |
| Available to public: | no |
