Sampling techniques include both non probability or judgmental sampling and

Sampling techniques include both non probability or

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Sampling techniques include both non-probability or judgmental sampling and probability sampling (Saunders et al., 2009). Probability sampling means that each case in a group has equal and known opportunities selected by a random method, while non-probability sampling is, selected from a specific sample in the group in a non-random manner (Saunders et al., 2009, ). Non-probability sampling is more commonly used in market surveys than probabilistic sampling because non-probability sampling requires less time and cost than probability sampling. Therefore, due to time and budget constraints, non- probabilistic sampling is suitable for this study. Questionnaires are sent to familiar university teachers to fill in, and then they send to their colleagues. The manner in which this particular kind of research is drafted by associates is called snowball sampling or chain sampling.This method of recruiting research subjects through acquaintances is called snowball sampling or chain sampling (Etikan and Bala, 2017). 3.3.3 Procedures for Data Collection Concerning procedures for data collection, Brace (2018) introduced three main types: telephone surveys, self-completed questionnaires and face-to-face interviews. In order to achieve the research purpose, this study decided to choose the self-filling questionnaire method. Also, this study uses a closed questionnaire based on the Internet, inviting the respondents to complete the questionnaire by visiting the website. Compared with other methods, web-based self-completed questionnaires have the advantages of lower cost and free choice of time for respondents to complete the questionnaires, which is also more efficient than telephone or face-to-face 28
interviews. However, a significant drawback is that the interviewer is unable to clarify the problem or misunderstanding in the presence (Brace, 2018). This study sent 120 questionnaires to target groups through the Internet. Questionnaires are distributed on the WJX website to facilitate data collection. Most of the respondents were very willing to participate in the study. I have sent out 250 questionnaires , andonly 13 respondents refused to fill out the questionnaire.Finally, 237 valid questionnaires were, analysed, and the feedback rate of the questionnaire is reasonable. 3.3.4 Analysis of Questionnaire Data Data collected through questionnaires can be, analysed by SPSS, a computer program for statistical analysis (Brace, 2018). In SPSS,researchers input data and define variables, then use appropriate methods for analysis. The bar chart and pie chart can be used to explain the necessary information. The statistical methods, such as correlation coefficient and regression analysis, can be used to analyse the correlation between work characteristics, salary and welfare, training and development opportunities, organisational climate and employee engagement, and the correlation between employee engagement and employee performance.

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