(a) A flute instructor examined student progress. He found that playing a longer song does not necessarily mean that a student will have more or fewer wrong notes. What can he conclude? oThere is no correlation between song length and number of wrong notes. OThere is a correlation between song length and number of wrong notes. There may or may not be causation. Further studies would have to be done to determine this. OThere is a correlation between song length and number of wrong notes. There is probably also causation. This is because there is likely an increase in the number of wrong notes with an increase in the song length. (b) An environmental study was conducted. It reported that, for a park, having more visitors indicates having a larger number of trees. What can be determined? oThere is no correlation between number of visitors and number of trees. OThere is a correlation between number of visitors and number of trees. However, there is no causation. This is because there is an increase in the number of trees with an increase in the number of visitors. OThere is a correlation between number of visitors and number of trees. There may or may not be causation. Further studies would have to be done to determine this. (c) Data was collected at a tennis court. It showed that being older implies that a player will stay for a shorter length of time. What is likely true? OThere is no correlation between age and length of stay. oThere is a correlation between age and length of stay. There may or may not be causation. Further studies would have to be done to determine this. OThere is a correlation between age and length of stay. However, there is no causation. This is because there is a decrease in the length of stay with an increase in age. lll')