# Linked Questions

44 questions linked to/from Famous statistical quotations
193 votes
80 answers
260k views

### Statistics Jokes

Well, we've got favourite statistics quotes. What about statistics jokes?
86 votes
10 answers
24k views

### Regarding p-values, why 1% and 5%? Why not 6% or 10%?

Regarding p-values, I am wondering why $1$% and $5$% seem to be the gold standard for "statistical significance". Why not other values, like $6$% or $10$%? Is ...
• 1,489
96 votes
5 answers
36k views

### When to use Fisher versus Neyman-Pearson framework?

I've been reading a lot lately about the differences between Fisher's method of hypothesis testing and the Neyman-Pearson school of thought. My question is, ignoring philosophical objections, when ...
• 1,892
28 votes
18 answers
7k views

### How to describe statistics in one sentence?

When I first started learning statistics, procedures like the t-test, ANOVA, chi-squared and linear regression each appeared to be very different creatures. But now I realise these procedures each do ...
77 votes
5 answers
32k views

### How small a quantity should be added to x to avoid taking the log of zero?

I have analysed my data as they are. Now I want to look at my analyses after taking the log of all variables. Many variables contain many zeros. Therefore I add a small quantity to avoid taking the ...
• 3,774
54 votes
9 answers
3k views

### Are all models useless? Is any exact model possible -- or useful?

This question has been festering in my mind for over a month. The February 2015 issue of Amstat News contains an article by Berkeley Professor Mark van der Laan that scolds people for using inexact ...
• 20.9k
41 votes
8 answers
26k views

### How to test hypothesis of no group differences?

Imagine you have a study with two groups (e.g., males and females) looking at a numeric dependent variable (e.g., intelligence test scores) and you have the hypothesis that there are no group ...
• 45.5k
49 votes
6 answers
24k views

### Is there an explanation for why there are so many natural phenomena that follow normal distribution?

I think this is a fascinating topic and I do not fully understand it. What law of physics makes so that so many natural phenomena have normal distribution? It would seem more intuitive that they would ...
• 659
58 votes
1 answer
22k views

### Why do my p-values differ between logistic regression output, chi-squared test, and the confidence interval for the OR?

I have built a logistic regression where the outcome variable is being cured after receiving treatment (Cure vs. No Cure). All ...
30 votes
7 answers
3k views

### Distribution hypothesis testing - what is the point of doing it if you can't "accept" your null hypothesis?

Various hypothesis tests, such as the $\chi^{2}$ GOF test, Kolmogorov-Smirnov, Anderson-Darling, etc., follow this basic format: $H_0$: The data follow the given distribution. $H_1$: The data do not ...
• 5,107
29 votes
5 answers
45k views

### How to test if my distribution is multimodal?

When I plot a histogram of my data, it has two peaks: Does that mean a potential multi-modal distribution? I ran the dip.test in R (...
• 431
22 votes
5 answers
3k views

### What is effect size... and why is it even useful?

I have an introductory-graduate-level statistics background (assume I know mathematical statistics and probability at an undergraduate level (e.g., Wackerly et al., Ross' Probability), and have some ...
• 5,107
28 votes
4 answers
2k views

### Pitfalls in experimental design: Avoiding dead experiments

I've come across this quote numerous times: To consult the statistician after an experiment is finished is often merely to ask him to conduct a post mortem examination. He can perhaps say what ...
6 votes
8 answers
3k views

### What's the name for this statistical fallacy?

I was told an anecdote by someone today who was trying to prove a point regarding safety. They said "50 people have been living in [area a] for the past two years one year (apparently I remembered the ...
• 163
8 votes
4 answers
862 views

### Why are statistics textbook questions so frequently totally artificial?

Anyone who reads the questions here on a regular basis quickly recognizes some questions as being from textbooks or exams. Such questions need the self-study tag and one reason for closing a question ...

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