A researcher working with data about individuals’ ages and their income wants to know how income is related to age. Does income go up or down or remain constant with age? Which analysis would help the researcher understand this relationship best?

A phone survey conducted with random digit dialing has all but which of the following features?

A. designation of telephone exchanges to be called B. machine-based calling of random phone numbers C. postcard follow-ups to those who don’t answer the phone D. screening questions to identify appropriate respondents

Because American political parties are organizationally weak, they are unimportant in the political system

Indicate whether the statement is true or false