Question

Suppose you wanted to find a critical test statistic for a confidence interval for the slope of the regression line. How many degrees of freedom would you need to use?

Answer 1

Answer:

See Explanation

Step-by-step explanation:

The question is incomplete, as the regression line is not given.

However, I will give a general explanation of how to calculate the degree of freedom of a slope of regression line

The degree of freedom is calculated using:

$df = n - k$

Where

$k \to number\ of\ parameters$

$n \to sample\ size.$

For a regression line; there are two parameters that are being estimates;

The intercept and the slope. So:

$k = 2$

Hence, the degree of freedom of a slope of regression line is:

$df = n -2$

So; if for example

$n =101$

the degree of freedom will be:

$df =101 - 2$

$df =99$