Premise:
"But people of all ages will invariably go out of their way to help a foreigner."
Hypothesis: A foreigner can find help from anyone no matter their age.

yes

Premise:
"From 1987 to 1994 share of USPS mail revenues from US household fell From a little less than 20 percent to a little more than 10 percent"
Hypothesis: The share of USPS mail revenues from US households went down a bit.

yes

Premise:
"New Orleans Square has two of the best attractions, namely, Pirates of the Caribbean and the Haunted Mansion."
Hypothesis: Out of the two, the Haunted Mansion is the generally favored attraction.
it is not possible to tell