# Recent content by SAMAR86

1. ### Multiple Regression

exactly I want to know how to identify the variables that have collinearity and or are confounders?
2. ### Multiple Regression

When we fit a multiple linear regression, how i can know which explanatory variables i should include and which ones i should exclude from the model, how i know the ones that could affect the model negatively? Thanks in advance
3. ### Testing the effect of gender on walking capacity using linear simple regression?

Hello, when i test the effect of gender on walking capacity using linear simple regression, i treated gender as categorical variable and change it from 0,1 to male, female. However the output i got is like that: Coefficients...
4. ### Guessing P value

thank you so much, i get it now
5. ### Guessing P value

please can you explain in more simple way, i am not a statistical person and it's my first class in statistics
6. ### Guessing P value

can you explain more please? how i can intrepret it in away i know if the p value is greater or less??
7. ### Guessing P value

I have a sample of 200 their body weight is normally distributed with mean 67kg and sd 20kg 95%CI (64.23, 69.77). the hypothesis is about whether mean is different between males and females, the statistical test i used to test this hypothesis is two-sample t-test. i also have the 95%CI of the...