SOAN 3120 Lecture Notes - Lecture 2: Statistical Inference, Descriptive Statistics, Continuous Or Discrete Variable

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How does it not: statistics cant take quantitative research without statistics, cases are the entities from which data are gathered (ex. people, business, cities, countries) Data: actual age cases: university students two main statistical applications: Statistical applications statistics: average average age of university students. Descriptive statistics summarize one variable (univariate: descriptive statistics, inferential statistics, summarize the relationship between two variables (bivariate, summarize the relationship between three or more variables (multivariate) Univariate descriptive statistics include: percentage, average, charts, and graphs, example: students have an average gpa (grade point average) of 3. 1. Multivariate descriptive statistics describe the relationships b/t three or more variables: ex. Gpas increase with age for females but not for males. Generalize , or infer, from a sample to a population: population includes all cases in which the research is interested, samples include carefully subsets of the population. Voter surveys are a common application of inferential statistics.

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