# Maths Keywords - Collecting and recording Data

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• Created by: Khristine
• Created on: 02-01-12 20:15
• Statistics: An area of mathematics concerned with collecting and interpreting data.
• Statistical problem-solving process: Form an idea to be tested - the hypothesis -> Collect relevant data -> Process and represent the data ->Calculate summary statistics -> Draw a conclusion
• Data: The information that has been collected
• ----Primary: Data that has been collected by the person who is going to use it
• ----Secondary: Data that has been collected by somebody else
• ----Qualitative: Data described in words
• ----Quantitative: Data given as a numerical value
• ----Discrete: Quantitative data that can only take certain numerical values
• ----Continuous: Quantitative data that can take any numerical value
• Population: The whole group of people you wish to find something out about.
• Sample: A select number of people from the population that can be surveyed to represent the total population.
• Biased sample: A sample that does not truly represent the population.
• Random sample: A sample that has given every member of the population an equal chance of being chosen.
• Strata: Non-overlapping groups within a population that share similar characteristics.
• Stratified sample: A sample…