Linked Questions

2
votes
1answer
8k views

Explaining p-value to a sophisticated layman [duplicate]

I think I understand the concept of p-value but unfortunately I still have to exert a lot of brain cycles to get my arms around it. I would like to get an explanation of the p-value that is rigorous ...
3
votes
2answers
32k views

Interpretation of the p-value of the y-intercept coefficient in a linear regression [duplicate]

I am trying to interpret one of the p-values in a one variable linear regression. Some of the answers I've seen for similar questions were not worded as thoroughly as I would have liked. My ...
2
votes
1answer
9k views

White noise test interpretation [duplicate]

How to interpret white noise test from Stata? Have a white noise means that a variable does not have autocorrelation. Can I say here that all of my variables has a white noise (does not have ...
0
votes
3answers
11k views

what does it mean for a variable to be statistically significant? [duplicate]

what does it mean for a variable to be statistically significant?? Could anyone give a complete answer to this question?
1
vote
1answer
7k views

What does the p value mean for Cox hazard ratio? [duplicate]

I am puzzled about the interpretation of P value in the Cox hazard ratio analysis. I read from literature that the P value is to "reject the null hypothesis that HR=1". However, in many cases, we have ...
0
votes
2answers
7k views

Why is smaller the p-value, larger is the significance? [duplicate]

I am trying to understand the concept of p-value. Wikipedia mentions: The p-value is defined as the probability, under the assumption of hypothesis $H$, of obtaining a result equal to or more ...
0
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2answers
2k views

How to read the alternative Hypothesis [duplicate]

I have created a T test in R and got the below output. ...
1
vote
1answer
1k views

Intuitive explanation of why p is not the probability of the null hypothesis [duplicate]

I've got to teach a basic course on the $\chi^2$ test soon, and I will of course insist on the fact that $p$ is not the probability of the null hypothesis to be true, and that the result of the test ...
1
vote
0answers
3k views

Is there an accepted definition for “P for trend” or “P-trend” [duplicate]

So is "P for trend" the same in principle as a common-or-garden P-value, but in a specific application i.e. odds ratios? And can P-value, P for trend, and P-trend be regarded as interchangeable ...
0
votes
1answer
2k views

Breusch-Pagan Test using R [duplicate]

I'm currently working on the Breusch-Pagan Test using RStudio through the command ncvTest. I've used the dataset pipeline.txt in ...
0
votes
2answers
3k views

T test and P value [duplicate]

Possible Duplicate: What is the meaning of p values and t values in statistical tests? I currently start epidemiology class, I am very confuse of p value and t test, what do they mean? how to use ...
-1
votes
1answer
2k views

Reset test in r [duplicate]

I have two questions about this test in R: How do you read the result of p-value? I assume that the bigger it is the more successful it is. When I do a multiple dummy variable regression, I get a p-...
2
votes
2answers
464 views

P-Value Clarification [duplicate]

I'm new to P-Values and Hypothesis testing and I noticed that p-values are explained differently everywhere I go. In my lecture notes it has a method for hypothesis testing and the last part says that ...
1
vote
1answer
918 views

How to read R program P-Value for Logistic Regression [duplicate]

I'm not used to that kind of p-value form as I don't know how to interpret it... It's usually shown a p-value with stars (significant codes) on its sides Can anyone help? How to read if the variable ...
2
votes
2answers
258 views

Why reject, not accept $H_0$ when $p$ value less than $\alpha$? [duplicate]

Let's say ABC drug company claims their medicine cures 90% of patients. Now a doctor conducts a trial by taking a random sample of 15 patients. Result shows 11 of them are cured but 4 are not. In ...
1
vote
1answer
605 views

What does “more extreme” mean when talking about p-values? [duplicate]

As far as I understand it, the p-value is the probability of obtaining the observed data or more "extreme" values under the null hypotesis, concluding that if this probability is small enough the null ...
0
votes
1answer
288 views

Generating i.i.d samples in MATLAB: large p-values [duplicate]

I'm trying to generate i.i.d samples from two uniformly distributed random variables in MATLAB. However, when I correlate the two sets of samples, I find that the correlation is almost zero, but the p-...
0
votes
2answers
251 views

Are p values obtained from t-tests? [duplicate]

Question: Are p-values determined from t-tests? What is the relationship between a p-value and a t-value? It states in this article here, the instructions to finding a t-value: How to Calculate T: ...
0
votes
1answer
267 views

Why reject Null Hypothesis when p value< alpha? [duplicate]

As per statistical literature, there seems to be this understanding that given a p value less than alpha, we are to reject the null hypothesis. The way I am interpreting this is that is the critical ...
0
votes
1answer
227 views

What does P>0.05; 0.025 < P ≤ 0.05 ; Yes, 0.01 < P ≤ 0.025 and, P ≤ 0.01 mean ? hypothesis testing p-values [duplicate]

I'm learning for my exam which is tomorrow and in the practice exam there are a lot of questions where you can choose between those p-values, but what do they mean? an example question A test is ...
1
vote
0answers
195 views

Anderson-Darling critical value in R [duplicate]

I am using R and i need to do an Anderson-Darling test on my data. I am using the adk package ( http://cran.r-project.org/web/packages/adk/adk.pdf ). How do I calculate the critical value for a given ...
-1
votes
2answers
67 views

Should you reject $H_0$ at the 0.10 level? [duplicate]

If the p-value is greater than 0.900, should you reject $H_0$ at the 0.10 level?"
0
votes
1answer
164 views

How to understand what a high p value indicates [duplicate]

I am reading a research article and trying to interpret and report the results. The article is comparing gabapentin and estrogen for the treatment of hot flashes. There was no difference between ...
0
votes
1answer
49 views

p value in a testing [duplicate]

Why does a test return the p value? I am looking at the Diebold-Mariano-Test (DM Test): https://github.com/johntwk/Diebold-Mariano-Test Basically, this test gives me a DM statistics, and also the p ...
0
votes
1answer
100 views

Interpreting what this means in a paper - significantly different at the .05 level? [duplicate]

I am having a hard time interpreting what something means in a paper I'm trying to get through. If you care, this is the paper: Gender Differences in the Effect of Education on the Slope of Experience-...
0
votes
0answers
102 views

What does p-value mean in Multiple Regression Analysis? [duplicate]

I was trying to learn the usage of p-value in Multiple Regression Analysis. I have found the following sentence which meaning is not clear to me. If the null hypothesis is true (b1=0), the chance of ...
1
vote
0answers
94 views

Poisson distribution help [duplicate]

In many cities, neighborhood Crime Watch groups are formed in an attempt to reduce the amount of criminal activity. Suppose one neighborhood that has experienced an average of 10 crimes per year ...
0
votes
1answer
65 views

What does my p-value indicate? [duplicate]

so I got similar results from a t-test output for my p-value 2.50e, but am not sure if it's correct or how to interpret. ...
0
votes
1answer
46 views

Precise definition of a p-value [duplicate]

We are given the following experiment: Consider an experiment which is a Bernoulli trial: it either succeeds with probability p or fails with probability 1− p; trials are independent of one another. ...
0
votes
1answer
75 views

P-value (statistics) T-test Analysis of Variance (statistics) +2 What does p-value of 0.7624 mean in a t test with two groups of relevation? [duplicate]

I’ve done 2 testing on 40 users using 2 Mobile App for each one I’ve got the time that each user has spent on them T-Test’s result is: t=0.48448,df=76.638,p-value=0.6294 Hyp-Alt: true difference in ...

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