Aresearcher posts a newspaper advertisement offering $10 in exchange for participation in a short study. the researcher accepts the first 10 people who respond to the advertisement. which of the following statements is true about the sample? a. it is a valid sample because money is offered to participants. b. it is not a valid sample because it is only a short study. c. it is a valid sample because the first 10 people were selected to participate. d. it is not a valid sample because it is not a random sample of the population.

D. It is not a valid sample because it is not a random sample of the population.

Step-by-step explanation:

When a researcher wants to know about the some thing, he/she has to take a sample from the population.

Example, consider a researcher wants to know how many hours the students study at home in a week, so the researcher has to take the sample from the student's population.

Here, he/she gives the advertisement and offers $10 for 10 people. Therefore, anyone can come they may not required for a particular study.

Therefore, answer is D)  It is not a valid sample because it is not a random sample of the population.

1. 3.4/4

2. 0.8/7

3. 0.5 x 3

4. 0.9 x 6

5. 10.8

6. 2.35

7. 0.567

8. 9.35

9. 0.02

10. 0.06

11. 0.16

12. 0.42

13. 0.63

14. 5.6

15. 8.1

16. 9.9

17. 0.28

18. 0.48

19. 0.27

20. 0.49

21. 0.45

22. 0.72

23. 0.9

24. 0.88

25. 0.75

26. 0.16

27. 0.328

28. 0.495

29. 0.72

30. 1.068