In the previous movie, we looked at descriptive statistics for…categorical variables.…In this one, we'll look at some common, and not so common statistics for…quantitative variables, using both R's built-in functions, and some specialized…functions from code packages.…To do this, I'm going to use the same data set: social_network.csv.…I'm going to come down here, and run line 12 to load it into a data frame called…sn, for social network.…We see in the console that that command ran, and on the Workspace on the…right, that that's loaded.…
The first thing I'm going to do is simply get the default summary for the…variable age, which is the age of the respondents.…I'm just going to run line 13 here, which says summary.…Then I'm specifying the data frame sn, and then the dollar sign is for the variable age.…By default, what I get is the minimum value.…So, apparently somebody who said they were six years older responded to this…online questionnaire.…Then I have the first quartile value, which is the lowest 25%, then the median,…
Author
Released
4/4/2013The course continues with examples on how to create charts and plots, check statistical assumptions and the reliability of your data, look for data outliers, and use other data analysis tools. Finally, learn how to get charts and tables out of R and share your results with presentations and web pages.
- What is R?
- Installing R
- Creating bar character for categorical variables
- Building histograms
- Calculating frequencies and descriptives
- Computing new variables
- Creating scatterplots
- Comparing means
Skill Level Beginner
Duration
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Introduction
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Welcome47s
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1. What is R?
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R in context3m 35s
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2. Getting Started
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Using RStudio4m 41s
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Reading data from a spreadsheet11m 17s
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Reading data from SPSS6m 14s
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3. Charts and Statistics for One Variable
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Calculating frequencies4m 24s
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Calculating descriptives7m 3s
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4. Modifying Data
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Recoding variables9m 56s
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Computing new variables4m 25s
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5. Charts for Associations
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Creating scatterplots4m 16s
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Creating 3D scatterplots2m 15s
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6. Statistics for Associations
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Calculating correlations6m 29s
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Computing a regression6m 33s
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Conclusion
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Next steps4m 11s
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Video: Calculating descriptives