(to) A health group conducted a survey. It showed that a heavier newborn did not necessarily need more or fewer diapers. What is probably true? There is no correlation between birth weight and the number of diapers needed. There is a correlation between birth weight and the number of diapers needed. There may or may not be causality. More studies would have to be done to determine this. O There is a correlation between birth weight and the number of diapers needed. There is probably also causality. This is because there would be a decrease in the number of diapers needed with an increase in birth weight. (b) A government study found that people buy more fuel when the price per gallon falls. What can we determine? There is no correlation between the amount of fuel purchased and the price. There is a correlation between the amount of fuel purchased and the price. However, there is no causality. This is because there is an increase in the amount of fuel purchased with a decrease in the price. There is a correlation between the amount of fuel purchased and the price. There may or may not be causality. More studies would have to be done to determine this. (c) Teacher Ramirez analyzed the homework and test scores of his physics students. He found that students who completed more homework did not tend to score higher or lower on the test. What should conclude? There is no correlation between the score obtained on the test and the amount of homework completed. There is a correlation between the score obtained on the test and the amount of homework completed. There is probably also causality. This is because there may be an increase in test scores with an increase in the amount of homework completed. There is a correlation between the score obtained on the test and the amount of homework completed. There may or may not be causality. More studies would have to be done to determine this.