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20 Cards in this Set
- Front
- Back
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Statistic?
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a value (usually numerical) that describes a sample…may be a single measurement or a set
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What do we want to collect on a random sample?
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Data.
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What are descriptive statistics?
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techniques that take raw scores and summarize them in a manageable form
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What are inferential statistics?
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methods that allow us to study samples and make generalizations about a particular population.
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In this class what types of statistics will we be using?
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Only descriptive statistics.
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What is population?
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the total number of individuals having a quality or characteristic in common
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What is sample?
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a representative part of a large population whose properties are studied, often to gain information about the population.
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What is parameter?
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a value (usually numerical) that describes a population…may be a single measurement or a set
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What is simple random sampling?
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every individual from the population has an equal chance of being selected for the sample.
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What is stratified sampling?
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selecting independent samples from a number of subpopulations or groups
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What is cluster sampling?
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selecting entire groups of individuals that are naturally occurring in the population.
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What is matched random sampling?
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individuals are matched on a characteristic of interest and randomly placed into groups.
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What is systemic sampling?
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sampling by rule (e.g., every 10th person).
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What is convenience sampling?
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sampling from the people to which you have access. Also called opportunity sampling.
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What is central tendency?
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a statistical measure that identifies a single score as representative of an entire distribution
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What are the two types of central tendency?
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Typical performance
Average performance |
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What are the three numerical indicators of central tendency?
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Mean, median, mode
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What is mode?
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Mode – the most common (frequent) score or scores
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What is median?
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Median – the numerical score or point that cuts the distribution in half
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What is mean?
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Mean – the arithmetic average
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