12. If there is a strong positive correlation between how much fat you eat and colon cancer. Which one of the following statements is the one that is most likely to be true, A. This proves that eating too much fat causes colon cancer. B. This proves that eating too much fat will stop you from getting colon cancer. C. There is evidence to suggest that eating too much fat causes colon cancer but there may be another explanation such as a lurking variable. D. The data is too vague to make any conclusion. 13. Which correlation coefficient indicates the strongest relationship? A. +0.18 B. -0.8 C. -0.2 D. +0.009 14. The best estimate of the correlation coefficient r in the Scatter diagram drawn below is: A. - 1 B. 0.4 C. 0 D. - 0.7 For questions 15 to 18 in each of the following situations state which of the following is most likely to be true when you look at the interaction of the two variables. A a positive correlation B a negative correlation C zero correlation D a correlation of - 1 E a correlation of 1 15. The age height of a tree and its weight. 16. The height of an adult and the last digit of their social security number. 17. The length of a pencil in inches and the length of the same pencil in centimetres. 18. The number of alchoholic drinks a person consumes in a week and how long they live? 19. In an experiment a fair coin is tossed 1000 times, after 999 throws there have been 500 heads and 499 tails. The chance that the next toss will result in a tail is which of the following. A more than 50% B less than 50% C exactly 50% D depends on the coin