Yes. The SET survey is completely confidential. Details of your individual response are not released. The report that is sent to your teacher only shows aggregated results such as frequency tables (i.e. number of students who gave a score of 5, 4, 3 etc) and lists of comments. Your teacher does not even find out which students responded to the SET and which students did not.
Please be assured that the confidentiality of respondents is very important to Planning and Analytical Services and that your response will only ever be reported in an aggregated format.