Question: What does population 1 and population 2 mean when conducting a T-test? Is it any different than the HA and H0? I was given a

What does population 1 and population 2 mean when conducting a T-test? Is it any different than the HA and H0? I was given a problem that includes a population 1 and population 2 , HA, and H0, but struggling to see if there is a difference between them.

Example:

Population 1: Airplanes with hydraulics

Population 2: Airplanes without hydraulics

HA: Airplanes with hydraulic systems fly better

H0: Airplanes fly the same regardless of whether they have a hydraulic system

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