An internet service provider wants to gain insight into how its customers use its service. A random sample ofN= 1,000 customers is drawn and surveyed. The survey results provide information on basic demographics (e.g., gender, age, ethnicity, education level, etc.) and answers to specific questions about internet use and behavior.

(b) The company wants to understand internet use with respect to education level. Which of the following statements are true? (Select all that apply.) Cl Using these data, the company may be able to prove a causal link between education level and internet use. Using these data, the company will not be able to prove a causal link between education level and internet use. C] The company should have randomly assigned customers to different education levels in order to evaluate a possible causal link between education level and internet use. Cl Since it is impossible to randomly assign customers to different education levels, the company will never be able to prove a causal link between education level and internet use. Cl If the company analysts observe a high R2 for the model predicting internet usage time using educational level, then the company can conclude that there exists a causal link between educational level and time on the internet. If the company analysts observe a high R2 for the model predicting internet usage time using educational level, then the company still cannot conclude that there exists a causal link between educational level and time on the internet