A community-based study of respiratory illness in the rst year of life gen- erated the following data. Socioeconomic Status Number of Children Number with Symptoms Low 79 31 Middle 122 29 High 192 27 (a) (3 points) Compute the probability of respiratory symptoms for each socioeco- nomic group. (b) (2 points) Calculate the odds ratio comparing the middle socioeconomic group to the high socioeconomic group. (c) (2 points) Calculate the odds ratio comparing the low socioeconomic group to the high socioeconomic group. (d) (1 point) Does there appear to be an association between socioeconomic status and respiratory illness in the rst year of life? Brie y justify your answer.