Approach

Maximum (secs)

Minimum (secs)

Range (secs)

Mean (secs)

Median (secs)

Skewness

Northern

72

2

70

23

20.5

1

Southern

65

3

62

20

16

1.5

Eastern

62

2

60

20

15

1

Western

61

4

57

25

23

0.4

All

72

2

70

22

19

0.9