Discuss the relative merits of using personal interviews, telephone interviews, and mailed questionnaires as data collection methods for each of the following situations:
a. A television executive wants to estimate the proportion of viewers in the country who are watching the network at a certain hour.
b. A newspaper editor wants to survey the attitudes of the public toward the type of news coverage offered by the paper.
c. A city commissioner is interested in determining how homeowners feel about a proposed zoning change.
d. A county health department wants to estimate the proportion of dogs that have had rabies shots within the last year.