# Questions tagged [p-value]

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28 questions
23 views

### Is P value Type I error in hypothesis testing?

I'm confused about the interpretation of P value in hypothesis testing. I know that we set significance level as 0.05 which is the threshold we set for this test so that it won't suffer from Type I ...
52 views

### Basic but illuminating examples of statistical modeling

I'd like to know the best examples that are simple and easy to understand, but which also capture the essence and the spirit of statistical modeling. What are some simple but also fundamental and ...
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### P-value vs. Bayesian statistics

Are there any theoretical considerations between $p$-value and the Bayesian statistics? I mean say, any theorem regarding both of these two concepts at a time.
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### Is a study with a small sample size less meaningful than one with a big sample size?

To my understanding, the p value of a study determines how likely a result this extreme or more extreme would happen if there were no effect (e.g. due to coincidence, measuring inaccuracies etc.). ...
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### p-value of specific test

I am trying to solve the following exercise: A control authority needs to test that the probability of getting $0$ at roulette is $1/37$ and bigger. After 1000 trials, they get the number $0$ $40$ ...
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### What if correlation coefficient is much less whereas the p-values is much lesser than the our significance level?

I have a data between rating of the restaurant and the approximate price of food in the restaurant. After doing Hypothesis testing. The pearson correlation coefficient was found to be 0.33 whereas p ...
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### Interpretation of the p-value and the test-statistic W of the Shapiro.test in R

Shapiro-Wilk normality test data: Part1 W = 0.14846, p-value = 6.478e-16 Shapiro-Wilk normality test data: Part2 W = 0.47978, p-value < 2.2e-16 Shapiro-Wilk normality test data: Part3 ...
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### How can I visually estimate, or eyeball, the p-value of a histogram?

The question is: what is the approximate P-value for the investigation of whether mother’s smoking during pregnancy has an effect on the length of gestation. The p-value of this histogram is ...
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### Should a variable with a high p-value exclude from the equation

I have just made a regression with 2 explanatory variables and one dependent variable. One of the variables have a p-value of 0.0303 which I consider significant and the other have a p-value of 0.708. ...
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### Calculating p from a set of assumed probabilities and their actual outcomes

I am playing a computer game where many actions have a set chance to succeed communicated to the player as a percent chance of success. I have began to suspect the the displayed chances do not ...
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### Using t table to determine P-value [closed]

I am doing an excercise with following problem: Use the t tables to estimate the P-value for t>=2.09 with 4 degrees of freedom. The answer is: 0.0524 ...
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### Regression: width of confidence interval vs t-statistic

My question is about confidence intervals of the slopes estimated in a multivariate regression. I would like to clear up something that is probably a fault somewhere in my understanding. As I ...
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### Devising a hypothesis test for machine failure rate

I'm trying to devise a hypothesis test for failure rate data of machines. The gist is that there are some machines in a factory that run all the time. They fail from time to time and are promptly ...
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### minimum significant regression coefficient value based on sample size

I have a dataset with 35 observations for five variables, namely ET, sw, ws, vpd,Ta. I am doing a simple linear regression between ET and each of the other four variables (i.e ET with sw; ET with ws; ...
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### How will p-values behave when fitting normal/Poisson to binomial?

I know p-values behave uniformly. Now as p(np) is fixed and n goes to infinity, binomial converges to normal(Poisson). Now suppose I take random binomial samplings and fir normal(Poisson) to it, for ...
I have the following problem: I have $X_1 ... X_n$ ~ Bernoulli(p) independent. I also have the following test hypothesis: $H_0: p = p_0$ and $H_1: p > p_0$. I define my test as follows: $T:$ I ...