11.18 You are interpreting the results of an opinion poll on the role of recycling in your town. A random sample of 400 people was asked to respond strongly in favor, slightly in favor, neutral, slightly against, or strongly against on each of several questions. There are four key questions that concern you, and you plan to analyze their results.

a. How do you calculate the expected probabilities for each answer?

b. How would you decide whether the four questions were answered the same?