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Function of Statistics

Function of Statistics. When researchers quantify their data at the nominal, ordinal, or interval/ratio level of measurement, statistics is used as a tool of either Description, Decision making, or Correlation. Description.

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Function of Statistics

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  1. Function of Statistics • When researchers quantify their data at the nominal, ordinal, or interval/ratio level of measurement, statistics is used as a tool of either • Description, • Decision making, or • Correlation

  2. Description • Allows for overall tendencies or group characteristics to be easily observed and easily communicated • Graphs are commonly used Final Exam Grades

  3. Anscombe’s quartet

  4. Anscombe's quartet

  5. Decision Making • Almost always, it is necessary to go beyond mere description. • Allows researchers to draw inferences from the sample to the population • Allows for generalizing • Statistics is a set of decision-making techniques that aid researchers in drawing inferences from samples to populations and, hence, in testing hypotheses regarding the nature of social reality.

  6. Correlation • Describes the relationship between two more variables • Correlation does not lead to causation

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