Statistics keywords 4.0 / 5 based on 1 rating ? MathematicskeywordsGCSEEdexcel Created by: SteffyJ28Created on: 20-09-15 19:55 Statistics Using information to answer questions. This information is observed, collected, ordered, represented and analysed. 1 of 26 Hypothesis An assumption that is the starting point of an investigation. It may or may not be true. 2 of 26 Quantitative variables Numerical observations or measurements. 3 of 26 Qualitative variables Non-numerical observations. 4 of 26 Continuous data Can be any value from a continuous numerical scale. 5 of 26 Discontinuous data Can only be particular values from a continuous numerical scale. 6 of 26 Ranked data Values that can be put in order. This data can be counted and ordered but not measured. 7 of 26 Categorical Set of data values that can be sorted into categories. 8 of 26 Data accuracy Any measurement that is accurate to +-1/2 unit. 9 of 26 Bivariate data Pairs of related values. 10 of 26 Population Everything and everyone involved in an investigation. 11 of 26 Census Data containing information about every member of the population. 12 of 26 Sample Information about a part of the population. 13 of 26 Sampling units Are the people or items that are to be sampled. 14 of 26 Sampling frame The list of the people or items that are to be sampled. 15 of 26 Random sample Chosen without a conscious decision about which items from the population will be selected. 16 of 26 Cluster sample Used when a population naturally divides itself into clusters and samples are taken from each cluster. 17 of 26 Quota sampling Instructions are given about the quota to be sampled from each section of the population. 18 of 26 Systematic sampling Choose a starting point on a sampling frame and select items at regular intervals. 19 of 26 Primary data Data collected by the person using it. 20 of 26 Secondary data Data collected by someone else. 21 of 26 Survey Selection of data from a given population to analyse a certain issue. 22 of 26 Pilot survey A collection of data from a small sample used to test design and methods. 23 of 26 Questionnaires Set questions used to collect data. 24 of 26 Open quetions Questions with no suggested answers. 25 of 26 Closed questions Questions with suggested answers. 26 of 26
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