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[Question] What is it called when one plot point shifts an entire study?

Is there a name for the concept of one point being such an outlier that it actually shifts the average above any other known point. For example let’s say there’s 10 people in a study, 9 of them generally average let’s say 150 lbs weight wise with normal…

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[Q] Dr Swan claims strong relationship between "AGD" and semen concentration, but the scatter plot looks like a low r value to me. What am I missing?

You'll see why I didn't spell out "AGD" when you look at the paper :) While watching the Netflix documentary about plastics and fertility ("The Plastic Detox"), they had a shot of Dr. Swan's paper.…

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[Research] Using exact sign tests due to small sample size, but needing to control for multiple comparisons

Context: I have to send my final dissertation manuscript to my committee tomorrow. My chair called me this morning and told me my stats are all wrong because I ran too many tests with too small of a sample (10 participants).…

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[Question] Educational testing and what exactly is the control?

I want to study if one technique of teaching has a significant impact on learning. Yes, I could do a pre- and post-test and with a matched pair t-test and look for significance. But my problem is assuming that any teaching will result in some learning.…

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[Discussion] Why do Forward and Backward Stepwise Regression algorithms produce different results?

I am performing an ordinal regression analysis with 10 predictors, reduced from an original set of 50. Sample size: N = 380. One of these predictors is the primary predictor of interest (Safety Hazards [SH], a continuous variable).…

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[Question] How to choose the best sample size for an experimental true experiment research?

Hi! We are doing a research paper for a veterinary med subject where we will test an effect of a certain GAG on a chicken embryo. Question is, what would be the best sample size to use? I can only think of using G Power, but from there how do I do it?…

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