Z test statistic

p-value

Group 1 & Group 2

−11.2690

0.0000

Group 1 & Group 3

37.9795

0.0000

Group 1 & Group 4

19.4076

0.0000

Group 2 & Group 3

54.1500

0.0000

Group 2 & Group 4

33.1146

0.0000

Group 3 & Group 4

−16.1056

0.0000