Can you please tell us where you are stuck and what you tried? It is hard to help you if we do not know where you are stuck and what method you want to use. So please post back with your work. You might want to read the forum guidelines, as if you did you would have received help by now.
This is for my college stats class, I asked my professor for help and said to start at a ≤ X ≤ b and then work up to (a-mu)^2 ≤ SD(X) ≤ (b-mu)^2. Then take the square root to get the final answer. I am stuck on the in-between part, getting from the start to the end.
All I have is a ≤ X ≤ b = (a-mu)^2 ≤ VAR(X) ≤ (b-mu)^2 = square root(a-mu)^2 ≤ VAR(X) ≤ (b-mu)^2 = a-mu ≤ SD(X) ≤ b-mu. But I feel like this is wrong I really do not understand how to do the proof
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