Question: Packages for maple 9

Hello, I am new in maple and I have maple 9. And I want to download some packages, like Statistics or ArrayTools, but I don't where I can find them. Could you help for me?

And another question. I had to rewrite program from matlab to maple. And there is function randn('state',100) in Matlab. It generates random numbers, but they always are the same. So could you tell me if there is a similar function in maple?

Thank you, sorry for my english language and silly questions :)

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