Linked Questions

0
votes
1answer
652 views

Interpreting the value of standard errors [duplicate]

After computing the standard error of regression, my answer is 3.55 what does the value mean
49
votes
2answers
114k views

Interpretation of R's output for binomial regression

I'm quite new on this with binomial data tests, but needed to do one and now I´m not sure how to interpret the outcome. The y-variable, the response variable, is binomial and the explanatory factors ...
11
votes
4answers
6k views

How can a t-test be statistically significant if the mean difference is almost 0?

I am trying to compare data from 2 populations to tell if the difference between the treatments is statistically significant. The data sets appear to be normally distributed with very little ...
7
votes
2answers
24k views

What exactly is the standard error of the intercept in multiple regression analysis?

I understand that in multiple regression analysis, for each independent variable, you would graph dependent variable vs independent variable and you would make a line of best fit and calculate the ...
8
votes
2answers
3k views

Why are the number of false positives independent of sample size, if we use p-values to compare two independent datasets?

If I run the R code below, it will generate two independent vectors then test them to see if they are related in some way (i.e. p-value < 0.05). If I repeat this 1,000 times, then 50 of these (5%) ...
7
votes
3answers
991 views

What is meant by correlation between intercept and slope(s)

I often hear (e.g., p. 99 of this book) that in a regression model (of any type), it is bad for slope(s) and intercept to be (highly) correlated. In R, this ...
5
votes
2answers
1k views

Relative importance of predictors - Standardized coefficients in Ordinal Logistic Regression

I am a 4th year psychology student. I need some help in understanding the coefficients in ORDINAL logistic regression. According to Williams (2009) "Using Heterogeneous Choice Models To Compare Logit ...
1
vote
2answers
2k views

Relationship between point estimation and confidence interval

Suppose I have a toy example for linear regression ...
-2
votes
1answer
401 views

What does the standard error of my IV estimate tell me?

I have computed the IV estimate and the standard error of the IV estimate. Why do I care about its standard error?
1
vote
2answers
572 views

What is empirical standard error and how to calculate it from lm in R?

I read from some articles saying that "empirical standard error is the standard deviation of the point estimates. For a general linear model, the point estimates are the model coefficients, such ...
0
votes
0answers
19 views

What does a changed T-value caused by a step function indicate?

I am trying to understand the significance of the intercept in my model. The model was created using lm.fit <-lm(target ~ .,train) and the intercept figures ...