Another or other? Singular or plural?

Hi! I always have the same doubt, although I correct the same mistakemultiple times once and another, I usually make myself the same question. So the question is about some words like, for example, "people". This word means some persons, right? But if I want to use it in a sentence it goes with "other" or with "another"? I think it is "another people", but I don't know...

Wht is your sentence?

people trefers to a group and doesn't have to have anything to accompany it like as follows:

Eample: The other group of people weren't working with us on the project.

The group of people over there weren't working with one another.

Those people wore black shirts to the concert.

People are very compassionate in my family.