Suppose that the average length of stay in Europe for American tourists is 17 days, with standard deviation 4.5. You choose a random sample of 16 American tourists. The sample of 16 stay an average of 18.5 days or more. What’s the chance of that happening?

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A: I hope this is helpful.

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Q: 食食假 6. Show that I(AUB) = max{1{A}, I{B}} = I{A} + I{B} - I{A} I{B}; I(AB)= min{I{A}, I{B}} = I{A}…

A: Examples: 1.  I{A∪B}=max{I{A},I{B}}=I{A}+I{B}−I{A}⋅I{B} Example 1: I {A } = 1,   I {B } = 0  :…