Statistics GCSE
Terms
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- Rank
- Where data chosen is in an order/list
- Systematic
- Where every nth value is taken
- 2 SD
- 95%
- Quantitative
- Numerical data
- 1 SD
- 68%
- 3 SD
- 99.7%
- Interval
- Data that doesn't have a true 0 value. E.g. shoe size, temperature
- Random
- Where each population has an equal chance of being picked
- Stratisfied
- Taking a proportional amount of the population from each group
- Ratio
- Has a true 0 value. 2(3km) = 6km
- Discrete
- Data that can be measured exactly
- Bivariate
- Where a set of data is collected with another. E.g. IQ and KS2 score
- Qualitative
- Descriptive data
- Sample
- Taking a group from the population to extract data from
- Census
- The whole population
- Categorical
- Qualitative data that is given a number to restrict the possible answers
- Continuous
- Data that cannot be truely measured and is only given to an approximate value