Collaborative-Adversarial Pair Programming

Table 4

𝑡-test results for CAP versus PP cost.

(a) The 𝑡-test procedure: statistics

Variable group	Lower CL		Upper CL		Lower CL		Upper CL
	𝑁	Mean	Mean	Mean	Std Dev	Std Dev	Std Dev	Std Err
Time CAP	6	486.32	599	711.68	67.024	107.37	263.35	43.835
Time PP	6	894.42	1209	1523.6	187.12	299.76	735.21	122.38
Time Diff (1-2)		−899.6	−610	−320.4	157.32	225.15	395.13	129.99

(b) 𝑡-tests

Variable	Method	Variances	DF	𝑡 value	Pr>|𝑡|
Time	Pooled	Equal	10	−4.69	0.0009
Time	Satterthwaite	Unequal	6.26	−4.69	0.0030

(c) Equality of variances

Variable	Method	Num DF	Den DF	𝐹 value	Pr>𝐹
Time	Folded 𝐹	5	5	7.79	0.0417