Question

5. In Minnesota there are 327 school districts. School districts are classified as urban, suburban or other. In these districts there are 987 elementary schools. The total number of students in these schools was 395,449. A state agency wants an estimate of the total number of student absences there were in all the elementary schools last January. Note, an absence is a day when the school is open but a student is not there. Assume the agency has a list of the schools and the total number of students in each school. Suggest a sampling design for the agency. What additional information, if any, could be provided by the state agency to help you choose the design. Do you see any problems in implementing your design? Specify your estimator and its estimated variance. Be brief but specific.

Answer 1

there at sto * Please give positive rating * So we have to estimate the total no. of edexend absense students in all the elementry school last January For it we have sample toame that in list of the schools and frotal no- of students is each school. Foo & welone Minnesota total have 327 school districts divided in a Urban, Subustan and other. we will use 'stratified sumpling for this problem, will divide the school in three strata 'Ustan, Suburtan and other, selects the sample Using 'proptional allocation, according to no of school in each district.

January then collect data on selected sample about the no. of student absent in state agency can provide attendence data for help in this purpose also data of students class wise. Estimator in mean. V/5st) = . ( N- W. She 32 19,3)