5. A group of medical researchers decided to test whether Botox can be used to reduce back pain. They randomly selected 72 patients who suffered from back pain. 38 of the patients were randomly assigned to receive a Botox injection. The other 34 were randomly assigned to receive an injection of saline (salt water). The researchers' claim was that the population proportions for signicant reduction in pain is proportionally the same for all individuals across both types of injection. Which of the following would be the appropriate hypothesis statements for a chi-square test of homogeneity? a. H0: The distribution of the population proportions for signicant improvement in pain is proportionally the same for all individuals across both types of injection. Ha: The distribution of the population proportions for signicant improvement in pain is proportionally not the same for all individuals across both types of injection. b. H0: The distribution of the population proportions for signicant improvement in pain is proportionally the same for all individuals across both types of injection. Ha: The distribution population proportion for people that did have signicant improvement in pain is higher for the botox injection. c. H0: The distribution of the population proportions for signicant improvement in pain is proportionally not the same for all individuals across both types of injection. Ha: The distribution of the population proportions for signicant improvement in pain is proportionally the same for all individuals across both types of injection