Question

32. More than 10% of people carry the parasite Toxoplasma gondii. The following table gives data from Prague on 15- to 29-year-old drivers who had been involved in an accident. The table gives the number of drivers who were infected with Toxoplasma gondii and who were uninfected. These numbers are compared with a control sample of 249 drivers of the same age living in the same area who had not been in an accident.

For part c) please depict the data in a mosaic plot! Thank you!

Answer 1

a) It's a cross-tabulation

b) the variables of comparison are accident and infection.
the explnatory variable is the independent variable which is accident. it is measured by the nominal scale of measurement. it is categorized as drivers with accidents and controls.
the response variable is the dependent variable which is infection. it is measured by the nominal scale of measurement. it is categorized as infected and uninfected.

c)

Line Chart infected uninfected drivers with accidents controls

There is a difference in the number of controls who are infected and those who are uninfected. there in no difference in the number of drivers with accidents who are infected and uninfected. hence the variables are said to be dependent on each other.