Below is data from a survey showing the health status of those who have and have not visited hospital in recent years. What types of data are in the table (discrete, continuous, categorical etc)? Interpret the table. Can the survey tell you if attending hospital affects health? (you are not expected to carry out formal tests or confidence intervals.) What other information might help you to analyse the data? [10 marks]

Data from the National Health Interview Survey (NHIS): Group Sample Size Health Status Std. Error Hospital 7,774 3.21 0.014 No Hospital 90,049 3.93 0.003 Notes: Health status ranges from 1 (poor health) to 5 (excellent health). Taken from Angrist and Pischke, 2009. "During the past 12 months, was the respondent a patient in a hospital overnight?" "Would you say your health in general is excellent, very good, good, fair, or poor?"