COMPLETE SOLUTIONS AND CORRECT
ANSWERS GRADED A+
⩥ Inferential statistics. Answer: The practice of extracting useful
information from a sample to draw conclusions about a population
⩥ Population. Answer: All members of a specified group
⩥ Sample. Answer: A subset of a population of interest
⩥ Sample statistic. Answer: A random variable used to estimate the
unknown population parameter of interest
⩥ Population parameter. Answer: A characteristic of a population
⩥ Cross-sectional data. Answer: Observations of a characteristic of
many subjects at the same point in time or approximately the same point
in time
⩥ Variable. Answer: A general characteristic being observed on a set of
people, objects, or events, where each observation varies in kind or
degree