Can someone verify the degrees of freedom when looking up critical values for all the tests?

n = observations k = slopes

**T-test**

df = n - (k+1) [note: is 1 due to the intercept?]

**F-test**

numerator df = k denominator df = n - (k+1) [note: is 1 due to the intercept?]

**Chi squared** (heteroskedasticity)

df = k

**Durbin-Watson** (serial correlation)

k is number of slopes? n is observations?

I’m not missing anything else, am I?