Further Mathematics Paper 2, WASSCE (SC), 2022

Question 6

 

The table shows the scores obtained by a group of artistes in Vocal (X) and Instrumental (Y) musical competition.

Vocal(X)

63

69

72

59

82

91

95

68

Instrumental(Y)

58

61

67

51

53

79

92

57

Calculate the Spearman’s rank correlation coefficient between the scores.

Observation

 

The Chief Examiner reported that many candidates attempted this question and displayed a good knowledge of ranking. Only few candidates could not apply the correct formula for Spearman’s rank correlation.