TABLE 1.

Independent t-test to compare the characteristics of respondents and non-respondents.

Group		N	Mean	Standard deviation	t-value	df	Significance (2-tailed)
Gender	Non-respondents	395	1.52	0.50	−1.55	715	0.12
	Respondents	322	1.57	0.50
Education	Non-respondents	395	2.87	1.35	0.07	715	0.95
	Respondents	322	2.87	1.39
Tenure	Non-respondents	395	5.87	1.31	−0.98	715	0.33
	Respondents	322	5.96	1.32
Age	Non-respondents	395	28.11	7.01	0.29	715	0.77
	Respondents	322	27.96	6.97