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In this video we conclude our illustration of one-way ANOVA models
in R
through Example 11 in Mod13Script.R. You should open this script in
RStudio and follow along while watching. In this…
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This video features the first half of our coverage of Example 9 in Mod13Script.R. You should open this script in RStudio and follow along while watching. Here we show how to fit simple linear and…
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This video gives a brief introduction to the lm() function for linear regression modeling in R. The basic syntax of this function is covered, including some attention to the specification of the…
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Chi-square tests are useful for categorical data. They can be used to test whether a vector of probabilities associated with each of several possible outcomes is equal to some null value. That null…
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The ifelse() function and if-else statements can be used to evaluate one of two expressions or chunks of code depending upon a Boolean logical condition. However, these constructions must be chained…
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There are several different functions and methods available in R to compute statistics or, more generally, apply functions to groups of observations within a data set. The tapply() function is one…
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The sort() function will sort a vector in R in either ascending or descending order. But a more powerful and flexible technique is to sort data by using the order() function to generate subscripts…
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This video presents an extended example from Mod8Script.R that deals with some fictitious quiz score data. Here we introduce several new functions for computing summary statistics and the t.test()…
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PROC ANOVA can handle one-way ANOVA models and multi-way ANOVAs with balanced data. It should not be used to fit and make inference from unbalanced multi-way ANOVA models. In this video we introduce…
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