A query that has the integrity to do. As follows: Select the sample population according to the structural units and inquire whether or not smoking it, make a query by performing between 2 – February 4, 2015.
The questionnaires were completed to action. The selection of the sample population as a structural unit and whether they smoke or not to do a query performed between 2 to 4 February 2558.
The perfection to proceed as follows: select samples according to the structure and population unit inquire whether smoking or so to do by the questionnaire on 2 - 4 February. 2558 .