In which institutional resource are leaders both appointed by the president and approved by the Senate?

A nationwide study was done in which samples of drivers were asked their opinions about the reliability of their cars. The results of the survey were analyzed for differences among drivers of different models and makes of cars

What survey design is being used in this study? a. cross-sectional design b. longitudinal design c. successive independent samples design d. correlated samples design

Interviews are generally preferred over questionnaires because

a. they are cheaper. b. they reduce the potential for bias. c. they allow the researcher to administer follow-up questions. d. all of the above