|
|
|
|
|
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…
Copyright
I created all of this content
|
|
In this video we continue 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…
Copyright
I created all of this content
|
|
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…
Copyright
I created all of this content
|
|
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…
Copyright
I created all of this content
|
|
In this video we illustrate the computation of Pearson, Spearman and Kendall correlations in R. We also illustrate some functions for doing inference in correlation coefficients. Finally, we show how…
Copyright
I created all of this content
|
|
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…
Copyright
I created all of this content
|
|
In Module 13 we cover the implementation of basic statistical methods in R. We begin with a discussion of some functions to compute summary statistics and to characterize univariate distributions. In…
Copyright
I created all of this content
|
|
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…
Copyright
I created all of this content
|
|
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…
Copyright
I created all of this content
|
|
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()…
Copyright
I created all of this content
|
|
In this video we implement a one-way ANOVA in PROC GLM, using the same example (Example #8 on Pizza Diameters) as in the previous video. But here we discuss the important difference between the…
Copyright
I created all of this content
|
|
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…
Copyright
I created all of this content
|
|
In this video we continue with Example #7 from Mod7Examps.sas, in which we regress the city mpg on weight for 93 cars in the 1993 Consumer Reports Cars dataset. Here we consider a model that is…
Copyright
I created all of this content
|
|
Copyright
I created all of this content
|