9. The 1994 General Social Survey of adult Americans asked subjects whether astrology- the study of star signs-has some scientific truth. Of 1245 sampled subjects who had an opinion, 651 responded definitely or probably true. and 594 responded definitely or probably not true The proportion responding definitely or probably true was 651/1245 = .523.

a) Describe the population of interest

b) For what population parameter might we want to make an inference?

c) What sample statistic could be used in making this inference?

d) Does the value of the statistic in

(c) necessarily equal the parameter in (b)' Explain,