Rishab Khandelwal

804267162

Discussion 3C: Xiao, Q.

Homework 1:

1.1) 9 variables

1.2) 11 observations

1.3) (a) Categorical variable (b) Numerical variable

1.4) (a) Numerical variable (b) Categorical Variable

1.5) Height, Weight

1.6) Male

1.33) Controlled experiment

1.35) Controlled Experiment

1.37) Observational Study

1.43) The study can be improved by increasing the sample size of the data. The experiment can also be

improved if all of the people recruited is already diagnosed with arthritis.

1.47) The study only observed about the production of antibodies. To make the study better, it can be

observed whether it actually prevented flu in the future.