You interview 75 students in their freshmen year and again in their senior year. Each interview includes information about height and weight, allowing the computation of each student's body mass index, BMI. You wish to assess whether there has been a significant change from freshmen to senior year in their BMIs. Select the best method to use to assess whether there has been a significant change from freshmen to senior year in their BMIs.

Select the best method to use to assess whether there has been a significant change from freshmen to senior year in their BMIS.

a. two-way ANOVA test
b. Wilcoxon rank sum test
c. Kruskal-Wallis test
d. Wilcoxon signed rank test

Option D is correct, Wilcoxon signed rank test

Step-by-step explanation:

This will be a dependent sample because same students are being surveyed. Hence,

We should use Wilcoxon signed rank test (which is a non-parametric statistical hypothesis test utilized to evaluate two related or connected samples, matched samples, or repetitive measurements on a lone sample to evaluate whether their population mean ranks differ.)

Option D is correct. Wilcoxon signed rank test.

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

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.