1) Deliveroo (www.deliveroo.com.au), the online food delivery company, wants to understand the causal impact of its website design on the probability of a consumer completing a transaction on the website. The company wants to conduct a randomized experiment with 1000 individuals in Australia before launching the new website design. As part of this experiment, the respondents should experience the website design when they next order via Deliveroo and then measure the relevant outcome. As the lead Marketing Research Analyst, you are asked to design a field experiment with 1000 individuals to test whether the new website design improves sales. (15 points) a) What is the dependent variable in this study? How are you going to measure it? (1 point) b) What is the treatment condition(s) - i.e. what is your independent variable? (1 point) c) What experimental research design will be used? Describe the design and represent in mathematical symbols. (2 points) d) What confounding/extraneous variables would be controlled by this experimental design? (2 points) e) Briefly comment on the internal and external validity of the design used. (2 points) You can assume that the website receives on average 100 customer visits per hour between 11 AM and 11 PM