Premise:
"The actual annual requirement for labor would be less if the estimated number of retrofit installations were evenly distributed over the full five-year increment of time instead of the conservative three-year increment."
Hypothesis: You would have to make more durable materials to reduce labor installation costs.

it is not possible to tell

Premise:
"She tried to sit up then fell back with a groan, her hand to her side."
Hypothesis: She was paralyzed and couldn't move at all.

no

Premise:
"Yet Arafat remains popular --he won 88 percent of the vote in last year's presidential elections, and recent polls estimate his public-approval ratings at about 65 percent."
Hypothesis: After winning 88% of the vote in the elections and with an approval rating of 65%, Arafat remains popular.
yes