Use our free Regression Intercept Confidence Interval Calculator to easily determine the reliability range for your regression model's intercept (b₀). Input your estimated intercept, its standard error, and the critical t-value to find the lower and upper bounds quickly. Essential for statistical analysis and hypothesis testing for accurate data interpretation.
Formula:
Confidence Interval (CI) = b0 ± tcritical * SE(b0)
Where:
- b0 = Estimated Intercept (the point where the regression line crosses the y-axis)
- tcritical = Critical t-value (obtained from a t-distribution table based on your desired confidence level and degrees of freedom)
- SE(b0) = Standard Error of the Intercept (a measure of the precision of the intercept estimate)