Final answer:
The population is all college students in the U.S., and the sample consists of 1,000 surveyed students. The sample statistic is the average spending on books by these students, while the population parameter is the estimated average spending by all U.S. college students.
Step-by-step explanation:
In the scenario described, the population refers to all college students in the United States, as the study aims to generalize findings about the entire group's expenditure on books per year. The sample consists of the 1,000 college students from the United States who were surveyed. They are a subset of the population and are used to estimate the characteristics (parameters) of the whole population.
The sample statistic is a summary measure computed to describe a characteristic of the sample. In this case, it would be the average amount of money the sampled 1,000 college students spend on books per year. Meanwhile, the population parameter is what the study aims to estimate about the entire population. The parameter of interest would be the actual average amount of money all college students in the United States spend on books per year, which is unknown and being estimated through the survey.