Linked Questions
12 questions linked to/from Is the exact value of a 'p-value' meaningless?
162
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5
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Why are p-values uniformly distributed under the null hypothesis?
Recently, I have found in a paper by Klammer, et al. a statement that p-values should be uniformly distributed. I believe the authors, but cannot understand why it is so.
Klammer, A. A., Park, C. Y.,...
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86
votes
10
answers
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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 ...
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95
votes
5
answers
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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 ...
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78
votes
4
answers
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How should tiny $p$-values be reported? (and why does R put a minimum on 2.22e-16?)
For some tests in R, there is a lower limit on the p-value calculations of $2.22 \cdot 10^{-16}$. I'm not sure why it's this number, if there is a good reason for ...
- 1,382
45
votes
4
answers
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Are smaller p-values more convincing?
I've been reading up on $p$-values, type 1 error rates, significance levels, power calculations, effect sizes and the Fisher vs Neyman-Pearson debate. This has left me feeling a bit overwhelmed. I ...
- 1,806
33
votes
3
answers
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Accommodating entrenched views of p-values
Sometimes in reports I include a disclaimer about the p-values and other inferential statistics I've provided. I say that since the sample wasn't random, then such statistics would not strictly apply....
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6
votes
1
answer
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What is an F test?
What is an F test and what does it show? Also what is an alpha, and how do I evaluate the p-value?
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1
vote
2
answers
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Interpret F-Value in ANOVA [duplicate]
When we conduct an ANOVA, we get F-Value and P-Value. If P-value if smaller than our alpha level of .05 for example, we reject our null hypothesis. What is the importance of F-Value that is obtained ...
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3
votes
1
answer
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Likert item as independent variable for ANOVA?
I am trying to analyze data based on a sample size of around 50 and would appreciate advice on which statistical test would be most appropriate. Participants, on a single questionnaire, were asked to ...
- 33
1
vote
3
answers
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Finding the level of significance of a sample
I have an exercise with the following information; $ 20\% $ of the set are youth, my sample of $ 139 $ persons have $ 39 $ youths. The exercise is to test if this sample is a representative sample of ...
- 111
1
vote
1
answer
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Least Squares Fits to Experimental Data
My attempt at making sense of the problem:
The problem provides us with the sum of squares (SS; I believe that's the $18.1$). We can use the SS along with the number of samples $(21)$ to get the ...
user44756
1
vote
0
answers
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Upsides of reporting a lower or upper bound vs. reporting the actual value [duplicate]
I often see research papers reporting lower or upper bounds. E.g.:
Patients treated with the splint regained mobility significantly more quickly (p less than 0.001) and preferred the splint to the ...
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