There are 3000 students in a school. In order to investigate a situation, we plan to take a sample with a capacity of 50. Please design a sampling method to take the above samples.

Analysis: This question can draw lots to draw samples, number all the students in our school, draw lots to make 1200 numbers with the same shape and size, then put these numbers in the same box, stir them evenly, and draw one number at a time for 50 consecutive times to get a sample with a capacity of 50.

First of all, number all the students in this school 000 1, 0002, 0003…

Make the numbers of 1200 into the same shape and size by drawing lots, and then put them in the same box.

When drawing lots evenly, draw lots 50 times at a time, and you will get a sample with a capacity of 50. Note: This topic examines simple random sampling. The advantage of the lottery method is simple and easy, but the disadvantage is that it is time-consuming and inconvenient when the overall capacity is very large. If the batch number is not evenly mixed, bad samples may be produced.