College Business Statistics homework help!?! asap please!!?

I have some questions on an assignment and i dont understand it at all! i read through the chapter a few times already!! here goes:

1 How would a business use information they get from standard deviations (in loan companies for example)?

2 Is it possible for a variance to be negative (explain)?

3 What is the smallest value a variance can have? Under what circumstances does the variance equal this smallest value?

4 Under what conditions is the sample variance smaller than the corresponding sample standard deviation?

If you know any of these could you help me out please!!?? i need to hand in this assigment by noon tomorrow and those are the only ones i havent figured out!

that’s too hard!

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