Consider the relationship between the number of bids an item on eBay receives and the item's selling price. The following is a sample of 6 items sold through auctions on eBay. Calculate the correlation coefficient. Numbers of Bids and Selling Prices Number of Bids, x 8 19 33 12 21 2 Price(in Dollars), y 5 4 2 2 3 2 Solution: ?(?) = 8 19 33 12 21 2 6 = 15.83 ?(?) = 5 4 2 2 3 1 6 = 3 ?(?2) = 64 361 1089 144 441 4 6 = 350.5 ?(?2) = 25 16 4 4 9 4 6 = 10.33 ???(?) = ?(?2) ?2(?) = 350.5 15.832 = 99.81 ???(?) = ?(?2) ?2(?) = 10.33 32 = 1.33 ???(?, ?) = ?? ? ???? = 8 5 19 4 33 2 12 2 21 3 2 2 6 15.83 3 = 273 6 15.83 3 = 45.5 47.49 = 2 ????(?, ?) = ???(?, ?) ???(?)???(?) = 2 99.81 1.33 = 2 132.74 = 2 11.52 = 0.17 x 8 19 33 12 21 2 x^2 64