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Sarah-Jane is an ecologist who sometimes masquerades as a geneticist. Her statistical knowledge is embarassing in some social circles, but revered in others. Which probably just makes it neutral.
She has a PhD in ecology from the University of Canterbury, NZ.
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To pull together our discussions so far on hypothesis testing and p-values, we will use the t distribution as an example to see how it all works. The t distribution (you may have heard it called Student’s t) is a probability distribution that looks like a bell-shaped curve (or normal distribution). If we sample repeatedly from…
This column is loaded with pop quizzes for you to test yourself on. If you haven’t already done so, catch up on yesterday’s piece on hypothesis testing for a refresher. Take a gander at the table below for a summary of the two types of error that can result from hypothesis testing. Type I Errors occur…
Have you ever wondered what it would be like if someone helped you step-by-step through your job search? A good recruiter does exactly that! Recruiters provide value to job-seekers by reviewing resumes, finding jobs that may be a good fit, and providing interview tips. But how does that process work? In this article we’ll cover…
Hypothesis testing is the foundation around which we prove our science is worth funding, publishing and sitting through a conference presentation for. I can’t overstate the importance of understanding hypothesis testing, such is the integral part it plays in biological analyses. The Null Hypothesis Fundamental to statistics is the concept of a null hypothesis, and…
We’ve been slowly coaxing you along in our R tutorials. We’ve introduced what R is, gave you a basic tutorial into how to use R and also spent some time learning how to explore your data with R. By now you are probably itching to use R for more complicated analyses. To indulge you, I…
Math is an important part of lab life, from making solutions to calculating protein concentrations, and miscalculations can cause mayhem for your experiments. Therefore it is important that your math is right, or you could spend weeks trying to figure out what’s going wrong in your experiments. I was hopeless at remembering how to do…
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