7.90 Pepsi or Coke? The battle for consumer preference continues between Pepsi and Coke. How can you make your preferences known? There is a webpage where you can vote for one of these colas if you click on the link that says PAY CASH for your opinion. Explain why the respondents do not repre- sent a random sample of the opinions of purchasers or drinkers of these drinks. Explain the types of distor- tions that could creep into an Internet opinion poll.