Q23 of 26 Page 14


X

X2

y

Y2

 35

  1225

108

11664

  54

  2916

107

11449

52

2704

105

11025

53

2809

105

11025

56

3136

106

11236

58

3364

107

11449

50

2500

103

10609

51

2601

104

10816

49

2401

101

10201

∑ X = 458

 ∑ X2 = 25456

 ∑ X = 946

∑ Y2 = 99474  

σx 2 = = = 2828.44 – 2589.68 = 238.76

σY 2 = = = 11052.66 –11048.35 = 4.31

Since the variance for x is greater than variance of y , therefore y is more stable.

More from this chapter

All 26 →
21
Calculate the standard deviation and mean diameter of the circles.

22

24
Which firm A or B, shows greater variability in individual wages?

25
For the team B , mean number of goals scored goals scored per match was 2 with a standard deviation 1.25 goals. Find which team may be considered more consistent?