Write probability statements relating hemline height, stock market prices, and “adventuresomeness” that correspond to the following description of these relationships:
Another example is that high skirt hemlines tend to occur when the stock market is advancing steadily (a bull market), although no one believes that hemlines cause the stock market to advance, or vice versa. Perhaps both reflect a pervasive feeling of confidence and adventure in our society. If we had an adequate index of “societal adventuresomeness,” hemline height and stock market activity might well be conditionally independent given the index.