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Statistics Review

Statistics Review. Discrete Variables. Continuous vs. Discrete. Probability/Frequency Distributions. Three Measures of Central Tendency. * Note that when distributions are symmetrical, the mean, the median and the mode will all be the same value.

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Statistics Review

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  1. Statistics Review Discrete Variables

  2. Continuous vs. Discrete

  3. Probability/Frequency Distributions

  4. Three Measures of Central Tendency * Note that when distributions are symmetrical, the mean, the median and the mode will all be the same value.

  5. Calculating the MEAN (average) using actual data

  6. Measures of Spread or Variability

  7. Variance and Standard Deviation using actual data.

  8. Variance and Standard Deviation using grouped data. • The actual data gives the “true values of mean and variance. • But, especially for large samples, grouped data is a good approximation.

  9. We have already looked at bivariate categorical data in the context of descriptive bivariate distributions …..

  10. Categorical Data

  11. Contingency Tables represent the association between two or more qualitative or categorical variables. Example of females in San Francisco:

  12. In this class, we will … • Re-examine bivariate data that are related to one another in a causal way. • Introduce standard discrete and continuous distribution/density functions (the binomial and normal distribution functions, respectively). • Analyze and characterize bivariate data that are characterized by these standard distributions.

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