Author: Will
How to Plot 2-Way ANOVA Interaction in R (with Example)
This tutorial shows how to plot the figure for the interaction in 2-way ANOVA in R. Steps of Plotting 2-Way ANOVA Interaction in R Step 1: Prepare the data The following is the data being used for the examples. It...
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How to Fix: Data must be 1-dimensional
You might encounter the following error when trying to convert Numpy arrays to a pandas dataframe. Exception: Data must be 1-dimensional 1. Reproduce the Error Output: Exception: Data must be 1-dimensional 2. Why the Error Happens It happens because pd.DataFrame...
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What is Linear Regression Model? Definition and Example
1. Definition of Linear Regression Model Multiple linear regression is a linear model accessing the relationship between a dependent variable (DV, or Y) and multiple intendent variables (IV, or X). For instance, you might want to test how consumer purchase...
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Two sample t-test: Definition, formula, and Examples
Two sample t-test is also called independent sample t-test or unpaired sample t-test. This tutorial explains what two sample t-test is, its formula, and examples of two sample t-test. Motivation Example Imagine that a researcher is interested in determining whether...
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Correlation: Definition, Formula, and Examples
1. What is Correlation? Correlation is a statistical measure of the relationship between two variables, X and Y. For instance, you can measure to what extent temperature (X) is related to the production of ice cream (Y). You probably would...
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What is the Difference between Independent and Paired Sample t-test
This tutorial explains what t-test is, and the difference between independent sample t-test (or two sample t-test) and paired sample t-test. It also explains what two-sample and one-sample t-test are. 1. What is independent sample t-test? Indepdent sample t-test examines...
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