Premise:
"it wasn't like that when i first"
Hypothesis: It wasn't like that before.

yes

Premise:
"As noted earlier, the material needed for multiple boiler installations is generally not reduced significantly over the projects if they were installed separately."
Hypothesis: It is better to just install the boilers as single projects.

it is not possible to tell

Premise:
"The sound was deep and the man groaned."
Hypothesis: The man groaned in pain.
it is not possible to tell