A shopkeeper thinks that the more newspapers he sells in a week the more sweets he sells. He records the amount of money (m pounds) that he takes in newspaper sales and also the amount of money he takes in sweet sales (s pounds) each week for seven weeks. The data are shown are the following table. 365 410 392 385 560 543 564 573 550 544 530 Newspaper sales (m pounds) 380 402 370 Sweet sales (s pounds) a Use the coding x-m-365 and y-s- 530 to find Sxx, Syy and Sxy. b Calculate the product moment correlation coefficient for m and s. c State, with a reason, whether or not what the shopkeeper thinks is correct.

AppendixLO1