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 ...
50 views

### Modify test statistic in one point to obtain low p-value

Consider an NHST, for example a one sample t-test for $H_0:\mu\leq0$. The test statistic is $T(x) = \frac{\bar{x} \sqrt{n}}{s(x)}$, which has $t(n-1)$ distribution. Now I make an observation $x^*$, ...
382 views

### How to choose a suitable $p$-value?

I encountered this problem: Suppose $Y$ has the following PDF $$f(y)=\frac c{(1+y)^2}\cdot I(0\le y\le \theta),\quad\theta>0.$$ A single value $y$ is observed from the distribution. ...
39 views

### what type of hypotheses does “goodness of fit” signifies , i.e is it single tailed or two tailed? [duplicate]

Suppose it is required to test the fitting of binomial distribution to the following data ( at level $\alpha =0.05$) : the parameter p is estimated as p = 0.494 , and the expected frequencies (given ...
55 views

### Conditionality in p-value definition

Can we interpret p-value: $$P(T(x)>t\mid H_0:\mu=\mu_0)$$ in terms of usual conditional probability, which some random variable (T - test statistics) is conditioned on an event that some population ...
479 views

### Correlation coefficient different from zero as Null hypothesis

According to Wikipedia: In inferential statistics, the term "null hypothesis" usually refers to a general statement or default position that there is no relationship between two measured ...
410 views

### Intuition behind the p value for pearson correlation calculation

I understand that p-value is the probability that the correlation we got happened by random chance and we typically want to keep that under 5%. I am okay with this logic when it applies to sampling of ...
124 views

### Logistic regression: Ranking of Betas (Categorical variable)

I am running a logistic regression in Stata and would like to rank a categorical predictor variable (which is translated into four binary variables). Stata gives out three of them and compares them ...
60 views

### On interpreting the statistical significance of R squared

I have performed a linear regression analysis to two series of data, each of which has 50 values. I did the analysis in SPSS and as a result got a table which says ...
17 views

### How to interpret the student t statistic in a sas proc univariate output [duplicate]

I ran a proc univariate on a SAS data set and one of the output results was: ...
13 views

### Interpreting results of Libreoffice Calc's TTEST function [duplicate]

I'm doing some data analysis on a small dataset (35 individuals) and I'm wondering whether my findings are statistically significant. Individuals are asked questions before and after a treatment, so ...
694 views

### Understanding ANOVA for comparison of models in R. Why is the result the same regardless of model order?

I'm trying to figure out why the anova function in R gives me the same results (for the p-value) regardless of the order of the models. ...
21 views

### what does value of t test mean? [duplicate]

I have two distribution of one variable and I've used t test to find how much they are significantly different. But I'm not very familiar with this test and don't know what does this values mean? is ...