Linked Questions
12
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"Accept null hypothesis" or "fail to reject the null hypothesis"? [duplicate]
I'm trying to conduct a Student's t-test for a table of values while trying to follow the explanation and details found on this website. I understand that if the p-value is
<.01 then it's really ...
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1
vote
2
answers
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Can a null be inconclusive? [duplicate]
My Null for the T-test is
h0: -tcritical < Tstat < +tcritical
I would like a confidence level of 95%.
If my empirical result satisfies the null, but not my confidence requirements (the p ...
- 135
0
votes
1
answer
299
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Hypothesis Testing terminology [duplicate]
I am studying now Hypothesis Testing. I use for it book High-Yield Biostatistics, Epidemiology, and Public Health and videos of Brandon Foltz (recommending these ...
- 1,129
0
votes
1
answer
358
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If p=0.999 why can't I conclude that there is zero or near-zero effect? [duplicate]
I have been doing statistics as part of my job for a few years now. But now I have to try and explain the logic of Null Hypothesis Significance testing to a statistically naive audience.
Say I have ...
- 2,187
0
votes
0
answers
265
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Why we do not accept the null hypothesis [duplicate]
Let's take an example (Taken from "Naked Statistics by Charles Wheelan") :
Null hypothesis - Substance abuse treatment for prisoners does not reduce their rearrest rate after leaving prison
...
- 2,693
0
votes
0
answers
82
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Can the null hypothesis be **more** true than the alternative hypothesis or vice versa? [duplicate]
As the title says, my question is can the null hypothesis ($H_0$) be more true than the alternative hypothesis ($H_1$) or vice versa?
For example, if the statistical power is really high (extremely ...
1
vote
0
answers
43
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How to test hypotheses properly? [duplicate]
I have a homepage which I would like to change in some ways. I would like to place a commercial banner on it Ha. In this regard, I dont want the change to affect ...
- 295
0
votes
0
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Accepting vs failing to accept the null hypothesis? [duplicate]
In this paper the authors state the following regarding a null hypothesis significance test:
If P-value < critical value, reject null hypothesis and accept the
alternative hypothesis (difference ...
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1
vote
0
answers
31
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Setting the conventional null hypothesis as the alternative? [duplicate]
I am a bit confused on assigning null and alternative hypotheses.
For example in comparing 2 interventions, conventionally, null hypotheses are usually stating that there are no differences in ...
- 11
0
votes
0
answers
30
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Is it appropriate to use paired t-test for comparing two means from the same sample obtained from two different methods? [duplicate]
I want to determine if method A provides the same results as method B. I obtain 2 sets of measurements using both method A and B. I therefore have 2 means that I want to compare using the paired t-...
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67
votes
14
answers
23k
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If we fail to reject the null hypothesis in a large study, isn't it evidence for the null?
A basic limitation of null hypothesis significance testing is that it does not allow a researcher to gather evidence in favor of the null (Source)
I see this claim repeated in multiple places, but I ...
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39
votes
7
answers
10k
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Why is the null hypothesis often sought to be rejected?
I hope I am making sense with the title. Often, the null hypothesis is formed with the intention of rejecting it. Is there a reason for this, or is it just a convention?
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40
votes
8
answers
25k
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Is it possible to prove a null hypothesis?
As the question states - Is it possible to prove the null hypothesis? From my (limited) understanding of hypothesis, the answer is no but I can't come up with a rigorous explanation for it. Does the ...
- 511
43
votes
4
answers
6k
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Justification of one-tailed hypothesis testing
I understand two-tailed hypothesis testing. You have $H_0 : \theta = \theta_0$ (vs. $H_1 = \neg H_0 : \theta \ne \theta_0$). The $p$-value is the probability that $\theta$ generates data at least as ...
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