Research Design返回

 

The target population of this survey was defined as the principals of all local secondary schools excluding the international schools. No sampling was required. 

This study was conducted by self-administered paper questionnaire, returned by the principals via mail or fax. The data collection period started from 13 June, 2007 and ended on 3 July, 2007. A total of 111 questionnaires were received via fax, but only 109 cases were considered valid. The response rate of this survey was 22.9%, with a standard error of sampling of no more than 4.2%, had it been a representative survey (Table 1).

 
 
Table 1. Contact information of the survey
 Successful Cases    Distributed Questionnaires   Response rate* Standard Error** 
 109   475   22.9%   4.2% 
  * Response rate is calculated as the number of successful cases divided by the number of distributed questionnaires.
** Calculated as if these are random sample surveys.