Population and sample
All the companies listed on SET were considered as the population and sample
frame of this research. There were 466 companies across different industries both
manufacturing and non-manufacturing companies. Following the telephone calls to the
companies, 12 companies refused to answer the questionnaire and they were excluded
from the sample. Hence the survey packages were delivered to 454 companies by post.
One blank questionnaire was returned due to invalid address. Two incomplete
questionnaires were returned due to ineligibility to respond because the respondents
recognized that they had insufficient knowledge to answer some particular questions.
This makes possible responses from 451 companies.