[r] How to calculate the 95% confidence interval for the slope in a linear regression model in R

Let's fit the model:

> library(ISwR)
> fit <- lm(metabolic.rate ~ body.weight, rmr)
> summary(fit)

Call:
lm(formula = metabolic.rate ~ body.weight, data = rmr)

Residuals:
    Min      1Q  Median      3Q     Max 
-245.74 -113.99  -32.05  104.96  484.81 

Coefficients:
            Estimate Std. Error t value Pr(>|t|)    
(Intercept) 811.2267    76.9755  10.539 2.29e-13 ***
body.weight   7.0595     0.9776   7.221 7.03e-09 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 157.9 on 42 degrees of freedom
Multiple R-squared: 0.5539, Adjusted R-squared: 0.5433 
F-statistic: 52.15 on 1 and 42 DF,  p-value: 7.025e-09 

The 95% confidence interval for the slope is the estimated coefficient (7.0595) ± two standard errors (0.9776).

This can be computed using confint:

> confint(fit, 'body.weight', level=0.95)
               2.5 % 97.5 %
body.weight 5.086656 9.0324

Examples related to r

How to get AIC from Conway–Maxwell-Poisson regression via COM-poisson package in R? R : how to simply repeat a command? session not created: This version of ChromeDriver only supports Chrome version 74 error with ChromeDriver Chrome using Selenium How to show code but hide output in RMarkdown? remove kernel on jupyter notebook Function to calculate R2 (R-squared) in R Center Plot title in ggplot2 R ggplot2: stat_count() must not be used with a y aesthetic error in Bar graph R multiple conditions in if statement What does "The following object is masked from 'package:xxx'" mean?

Examples related to statistics

Function to calculate R2 (R-squared) in R pandas: find percentile stats of a given column What exactly does numpy.exp() do? Find p-value (significance) in scikit-learn LinearRegression How to plot ROC curve in Python Pandas - Compute z-score for all columns Calculating percentile of dataset column How to normalize an array in NumPy to a unit vector? How to find row number of a value in R code np.mean() vs np.average() in Python NumPy?

Examples related to linear-regression

Accuracy Score ValueError: Can't Handle mix of binary and continuous target TensorFlow: "Attempting to use uninitialized value" in variable initialization gradient descent using python and numpy Adding a regression line on a ggplot How to calculate the 95% confidence interval for the slope in a linear regression model in R What is the difference between linear regression and logistic regression? Multiple linear regression in Python Add regression line equation and R^2 on graph Linear regression with matplotlib / numpy How to force R to use a specified factor level as reference in a regression?

Examples related to confidence-interval

How to calculate the 95% confidence interval for the slope in a linear regression model in R Compute a confidence interval from sample data