I've just learned that there are always two groups while comparing items.
Called Subject - who gets the treatment
Called Control - who don't
The way we select who is subject and who is control is through randomized controlled such as tossing a coin...
I think I will pass these two chapter and move further for Descriptive Statistics (Part II)
That is for today and now I need to sleep as it 12:18 AM here in Australia....
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