Tag Archives: Python

Calculating sample size for a 2 independent sample t-test

Scientists often plan for studies by calculating how many subjects or units need to be tested in order to find an effect. That is, they plan for a study using statistical power according to principles of hypothesis testing. Sample size calculations are usually required in ethics applications and grant proposals to justify the study. We previously learned how to calculate

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IPython magic commands

Jupyter notebooks are a scientific computing development platform that can run many different programming languages, including Python via the interactive Python interpreter IPython. The key advantage in a notebook environment is that code can be sectioned into cells for testing while retaining all the interactive features of IPython, including magic commands. IPython magics are a specialised set of commands hosted

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Independent t-test in Python

In a previous post we learned how to perform an independent t-test in R to determine whether a difference between two groups is important or significant. In this post we will learn how to perform the same test using the Python programming language. Along the way we will learn a few things about t distributions and calculating confidence intervals. dataset.In

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File in/out: How to import CSV files into Python using Pandas

Comma separated values (CSV) files are a type of text file commonly used to store data. In a CSV file, each line of text contains values separated with commas. CSV files can be imported into Python in different ways (eg. csv.reader, numpy.loadtxt, etc). One useful method is to import CSV files into Pandas dataframes. Pandas package. Pandas is a Python

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