3.3. The method of sampling and handing-out questionnaires
Due to limitations associated with time, human resources, and
the motivation of survey respondents, this study employed the
method of convenience sampling. In consideration of the sampling
fairness of information collections, the questionnaires were
distributed to every administrative district. The formal questionnaires
were handed out during March and April of 2013 in Macau
and during May to June of 2013 in Singapore. According to
Churchill's formula (Churchill & Surprenant, 1982), 400 copies of
the questionnaire are required to reach the necessary size of the
sample. Consequently, 480 surveys were distributed in Macau, and
450 copies were handed out in Singapore. After eliminating the
inefficient responses, we received a total of 416 useable responses
from Macau and 409 useable responses from Singapore.
After analyzing these questionnaires, the study obtained Cronbach's
coefficient alpha values of .938 for Macau and .898 for
Singapore and KMO values of .858 for Macau and .832 for
Singapore. Based on the Cronbach's coefficient alpha and KMO
values, this formal questionnaire had relatively high reliability and
validity. The collected data were thus found to be useful for further
analyses.