Question: Online banking again Suppose that the information in Exercise 18 had been presented in the following way. A national survey of bank customers finds that

Online banking again Suppose that the information in Exercise 18 had been presented in the following way. A national survey of bank customers finds that 40% are younger than 50. Of those younger than 50, 5 of 8 conduct their banking online. Of those older than 50, only 1 of 12 banks online. Draw a tree for this situation. Why is the tree better than the table in this case?

Where are the joint probabilities found?

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