Javier has designed a survey to measure the attitudes of the students at his university about the bus service on campus. he hopes to survey 1000 of the 21,000 students on campus. all the students at javier's university form the from which he will draw his sample

research population

Explanation:A research population refers to an overall large collection of people or objects which are the major focus of the scientific study or query. A research sample on the other side is a sample of people who selected from a larger group to represent the whole population.

i only have part a but here is the first one: - lewis and clark are born

- lewis marries sacajawea and clark is jealous  

- clark drowns lewis and then goes to jail

answer; strength of association;