Linked Questions

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Conceptual understanding of the P-value [duplicate]

What I currently understand about the P-value is that, if the null hypothesis were true, the P-value is the probability of getting a value of the sample test statistic that is at least as extreme as ...
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2answers
33 views

Logic of Hypothesis Testing [duplicate]

I know that there is something wrong in the following reasoning but I cannot explain it, can you say what is wrong with the following reasoning: Null Hypothesis: The coin is fair (that is, the ...
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0answers
62 views

Testing normality [duplicate]

How can I (in R) test whether the given data set is normally distributed? I read related questions suggesting shapiro.test. Unfortunately, according to wikipedia, ...
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1answer
48 views

intuition/logic behind comparing p-value and significance level [duplicate]

I'm new on this forum and I hope that this is not already asked. My question is this: I know that the p-value is defined as $p=P($obtaining sample as or more contradictory to $H_0$ then the one ...
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2answers
36 views

How to tell if my mean values are not significantly different? [duplicate]

I am looking to test if two mean and standard deviation values I obtain are not significantly different (comparing a sensor method to the gold standard). I am planning on using a two-tailed t-test in ...
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0answers
57 views

Grasping the concept of P-value [duplicate]

I am having a hard time grasping the concept of the P-value.. I've read some of the posts in here and on internet, but one thing seem to be missing for me. Usually we look at the probability of ...
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2answers
44 views

Understanding P-Value with respect to the Level of Significance [duplicate]

The definition of P-value is the probability of obtaining a sample that is more extreme than the ones observed in your data, assuming that the null hypothesis is true. That 's very well-explained in ...
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0answers
45 views

Interpret the KS test [duplicate]

I have two continuous distributions and I am trying to compare them using KS test using R Studio with the code below: ...
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44 views

what would be the null and alternative hypotheses? [duplicate]

In the following statement, what would be the null and alternative hypothesis? The researcher wants to test (at the 1% level), whether the true mean score is at least 5 points. I got confused because ...
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1answer
44 views

Non-significant variable in regression [duplicate]

How do you explain a significant variable (p-value less than 0.05) in a linear regression equation in layman terms?
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0answers
32 views

What is p-value in simple words and good non-mathematical examples? [duplicate]

Can someone explain in simple words and with many good down-to-earth examples what is the p-value and how do we find it? Is it true that it shows what is the probability that the sample we have ...
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31 views

Question about p-value [duplicate]

I need someone proficient enough in stats to help me clear up some confusion. The p-value is a conditional profitability. Given a null hypothesis to be true (mean difference in two groups to be 0), ...
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0answers
28 views

Yet another question about p-value interpretation [duplicate]

I'm almost positive I'm going to be marked for duplicate, but I really really just need this sorted out once and for all with a simple example. I don't understand how a small p-value is evidence ...
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2answers
21 views

What exactly is critical value in statistics? I confuse it with p-value and always get it wrong [duplicate]

I learnt that a p-value lower than the alpha value of 0.05 leads us to reject the null hypothesis and vice versa. It seems to be the opposite for critical values. What then, is this critical value - ...
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0answers
26 views

Derive p value from t distribution [duplicate]

I have difficulty of understanding p-value from An Introduction to Statistical Learning by Gareth James • Daniela Witten • Trevor Hastie Robert Tibshirani (2015) : 67 Consider simple linear ...

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