by Erik Marsja | Nov 22, 2020 | Programming, Python
In this Python data analysis tutorial, you will learn how to perform a paired sample t-test in Python. First, you will learn about this type of t-test (e.g. when to use it, the assumptions of the test). Second, you will learn how to check whether your data follow the...
by Erik Marsja | Nov 19, 2020 | Programming, Python
In this tutorial, related to data analysis in Python, you will learn how to deal with your data when it is not following the normal distribution. One way to deal with non-normal data is to transform your data. In this post, you will learn how to carry out Box-Cox,...
by Erik Marsja | Nov 8, 2020 | Programming, R
In this brief tutorial, you will learn how to add a column to a dataframe in R. More specifically, you will learn 1) to add a column using base R (i.e., by using the $-operator and brackets, 2) add a column using the add_column() function (i.e., from tibble), 3) add...
by Erik Marsja | Nov 4, 2020 | Programming, R
In this tutorial, you will learn how to rename factor levels in R. First, we will use the base functions that are available in R, and then we will use dplyr. To rename factor levels using levels() we can assign a character vector with the new names. If we want...
by Erik Marsja | Nov 1, 2020 | Programming, R
In this R tutorial, you will learn how to remove duplicates from the data frame. First, you will learn how to delete duplicated rows and, second, you will remove columns. Specifically, we will have a look at how to remove duplicate records from the data frame using 1)...
by Erik Marsja | Oct 22, 2020 | Programming, Python
In this Python tutorial, you will learn how to 1) perform Bartlett’s Test, and 2) Levene’s Test. Both are tests that are testing the assumption of equal variances. Equality of variances (also known as homogeneity of variance, and homoscedasticity) in population...
