Enhancing Human-Computer Interaction in Digital Repositories through a MCDA-Based Recommender System

Table 2

Results of t-test.

	Q1		Q2		Q3		Q4
	Variable 1	Variable 2	Variable 1	Variable 2	Variable 1	Variable 2	Variable 1	Variable 2
Mean	8,32	7,3	7,84	6,88	7,94	6,76	8,54	7,1
Variance	0,997551	0,867347	1,647347	2,189388	0,95551	1,206531	0,58	1,357143
Observations	50	50	50	50	50	50	50	50
Hypothesized mean difference	0		0		0		0
df	98		96		97		84
t Stat	5,281504		3,465575		5,674598		7,315882
(T ≤ t) one-tail	3,86E − 07		0,000396		7,21E − 08		6,96E − 11
t critical one-tail	1,660551		1,660881		1,660715		1,663197
(T ≤ t) two-tail	7,73E − 07		0,000793		1,44E − 07		1,39E − 10
t critical two-tail	1,984467		1,984984		1,984723		1,98861