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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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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…
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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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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…
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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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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…
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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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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…
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In this video we describe partial correlation coefficients and why they are useful. Then we demonstrate the computation of such measures in PROC CORR using an example involving measures of body girth…
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This video illustrates PROC UNIVARIATE for conducting a one sample t test and examining the assumption of normality underlying the t test. It also features the use of the ODS SELECT statement. PROC…
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This video demonstrates the use of PROC TTEST for paired and one-sample t tests on means. We also examine the ODS Graphics produced by this PROC when implementing these tests.
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This video demonstrates some of the basic capabilities for producing descriptive statistics, graphical summaries, and basic inferences on one variable at a time with PROC UNIVARIATE.
This video…
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