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. Acity 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.