A horse trainer teaches horses to jump by using two methods of instruction. Horses being taught by method A have a lead horse that accompanies each jump. Horses being taught by method B have no lead horse. The table shows the number of training sessions required before each horse performed the jumps properly.   Method A 41 21 47 42 46 44 Method B 25 23 37 29 35 20 ​ Method A 34 24 32 31 43 40 Method B 26 45 39 27 49   ​ Use a rank-sum test with a 10% level of significance to test the claim that there is no difference between the training sessions distributions. Verify that the rank-sum is 112, and the z value is –1.23. State the conclusion of the test and interpret your results with a 10% level of significance

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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A horse trainer teaches horses to jump by using two methods of instruction. Horses being taught by method A have a lead horse that accompanies each jump. Horses being taught by method B have no lead horse. The table shows the number of training sessions required before each horse performed the jumps properly.
 

Method A

41

21

47

42

46

44

Method B

25

23

37

29

35

20

Method A

34

24

32

31

43

40

Method B

26

45

39

27

49

 

Use a rank-sum test with a 10% level of significance to test the claim that there is no difference between the training sessions distributions. Verify that the rank-sum is 112, and the z value is –1.23. State the conclusion of the test and interpret your results with a 10% level of significance.

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