Answer
(a) Sample: the 1245 subjects who responded to the General SocialSurvey question on astrology. Population: the American adult public.
(b) Variable: subject’s response about whether astrology has scientific truth,which is categorical.
(c) $651$/$1245 = 0.52$
Work Step by Step
The sample is a the tested group and the variable is the difference between the tested group and the control group.
