What if all right-hand side variables have mean close to zero? Intercept
will be close to the sample mean even if model is significant.
On 15 May 2001, Alan McLean wrote:
> Hi to all,
>
> The usual test for a simple linear regression model is to test whether
> the slope coefficient is zero or not
If the mean of the predictor X is zero, the intercept is equal to the
mean of the dependent variable Y, however steep or shallow the slope
may be. And as Jim pointed out, the standard error of a predicted value
depends on its distance from the mean of X (being larger the farther
away it is fr
Hi
On 15 May 2001, Alan McLean wrote:
> The usual test for a simple linear regression model is to test whether
> the slope coefficient is zero or not. However, if the slope is very
> close to zero, the intercept will be very close to the dependent
> variable mean, which suggests that a test could
Hi to all,
The usual test for a simple linear regression model is to test whether
the slope coefficient is zero or not. However, if the slope is very
close to zero, the intercept will be very close to the dependent
variable mean, which suggests that a test could be based on the
difference between
