Various research studies and personal lifestyle advisers argue that increased social interaction is important for a higher quality of life. You have been asked to determine if people who are single (variable single = 1) have a healthier diet than those who are married or living with a partner. Determine if there is strong evidence for your conclusion. You will do the analysis based first on the data from the first interview, creating subsets of the data file using daycode = 1, and a second time using data from the second interview, creating subsets of the data file using daycode = 2. Note differences in the results between the first and second interviews.