Question

A superstore manager wishes to give out a survey to a sample of 25 of its workers. It wants the sample to be a good representation of the workers. The table shows the numbers of workers in each section of the work force:

Working tills: 32
Stacking shelves: 24
Office/managers: 24
Warehouse: 20

Describe exactly how this can be done.

Answer 1

any help?

Answer 2

Either it can be done completely randomly or randomly within each group, taking 8 from the largest group, 5 from the smallest and 6 each from the middle groups. (That is 25% of each group.)