Here I am on Earth trying to determine if the people here are religious or not??

Here I am on Earth trying to determine if the people here are religious or not. Three things I am looking for are prayer to a higher entity, sacrifice, and public acknowledgment of their god in ways other than prayer.
The clues I am now assessing include people attending their houses of worship, people wearing crosses around their necks as jewelry, and people with their heads bowed in prayer. These people with their heads bowed in prayer have so many variations in their actions. Some people are at their dinner table praying, some people kneel on the ground in a line with other people five times per day to pray, and some bow their heads and put their hands together, and use a string of beads to pray with.
The earthlings seem to practice sacrifice openly and variably. They are not, perhaps, killing a goat, burning it, and attempting to give it to the deity, but instead, people are sacrificing personal actions. The man who used to steal does not steal anymore, hoping this sacrifice will please his god. So it is with the woman who used foul words heavily in speech. She now, however, is trying to give up (sacrifice) her obscene language because she feels like she cannot reap the benefits of being a servant of her god if her language is not pure. She does not want to grieve her higher being, so she sacrificed her abhorrent language. Sacrifice occurs in Buddhism when practicing Sutra and one adopts the practice of abstaining from sensual enjoyments.

People in different parts of the world seem to all carry the same book, but from one continent to another, the books differ. In the Middle East, they carry a Quran. In Asia, their book is the Tripitaka. In North America, the book they carry is called Holy Bible. Some read it every day, some read only on Sundays, some only