383504
Description
Flashcards by Candlepiecheese , updated more than 1 year ago
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Created by Candlepiecheese
over 12 years ago
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| Question | Answer |
| What is statistics? | Collecting, analysing, interpreting and presenting data |
| What is a variable? | Characteristic being recorded |
| Define data | Unordered list |
| Define information | When data becomes ordered |
| Nominal | Can't be ordered at all, eg; hair color |
| Ordinal | Can be arranged in some way, eg; exam grade |
| Discrete | Can only have certain values, eg; age |
| Continuous | No exact value and can be ordered, eg; weight |
| How can information be displayed? | Bar chart, pie chart, stem and leaf, histogram and scatter plot |
| Another word for average | Central tendency |
| Another word for spread | Measuring variability |
| What is a census? | A survey of the whole population |
| What is the population? | Entire group being studied |
| What is the sample? | Group selected from the population |
| What is a parameter? | Numerical measurement describing some characteristic of a population |
| What is a statistic? | Numerical measurement describing some characteristic of a sample |
| What's a simple random sample? | Every person has an equal chance of being selected |
| What is a stratified random sample? | Population split into subgroups then simple random sampled |
| What's a systematic random sample? | Random number picked, eg; 17, so every 17th person is picked |
| What is cluster sampling? | Population randomly divided into groups and some tested |
| What is quota sampling? | No probability, companies use this, population not random |
| What is convenience sampling? | Where the subjects are chosen in the most convenient way possible |
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