a Temperature in the summer and amount of ice cream sold b I

10. For each of the following pairs of variables, determine the type of association, if any, between them. (Assume that you have obtained information on 50 subjects in your study.) Temperature in the summer and amount of ice cream sold. Incident of vaccination in a city and incidence of illness in that city. a. b.

Solution

a) The increase in temperature will lead to more people eating ice-cream in the city and hence the number of ice-cream sold will be going to increase in the summer interval

Hence there is a positive correlation,since increase in temperature will lead to more selling of ice-creams

b) The incident of vaccination in city will protect more people from a particular disease and the illness rate in the city will decreases

Hence there is a negative correlation,since more number of vaccines campaign will lead to less number of illness in the city