Q:the principal of a post primary school intend to select 30 student from the member of the school quiz teams. he decide to select his team member from ss1, ss2 and ss3 with the following class member of 100,150 and 80 students respectively. use appropriate sampling scheme to assist the principal to select his team.
Sampling scheme used is stratified sampling.
In tabular form
|No.of stdnts |samplesize
Ss1: 100. (100/330)30=9.09
Ss2:150. (150/330)30=13.64
Ss3:80. (80/330)30=7.27
330
Add up the sample size=9.09+13.64+7.27=30.