S1 Chapter 1: Introduction to Statistics

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  • Introduction to Statistics
    • Variables
      • Qualitative Variable
        • do not have a numerical value
      • Quantitative Variables
        • Have a numerical value
        • discrete
          • there are no possible values in between
        • continuous
          • can take any value in an interval
    • Populations
      • All the possible data
      • A parameter is a numerical property of a population
    • Data
      • Primary Data
        • Collected for a specific investigation
      • Secondary Data
        • Not collected specifically for an investigation
    • Sampling without bias
      • Random Sampling
        • Every member of the population must have an equal chance of being in the sample
    • Sample
      • Part of the data
      • A statistic is a numerical property of a sample

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