A college counselor investigated students' daily recreational screen time. The college consisted of students enrolled in four different diploma programs: Business, IT, Engineering, and Art, with 200 students in each program.
She conducted surveys individually with 16 students. One of the questions in the survey was, "On average, how many hours of recreational screen time do you have per day?" The results from this question are shown in Table 1.
Table 1 Average daily recreational screen time (hours) for each student
| Student | Screen Time (hours) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 3 |
| 4 | 4 |
| 5 | 1 |
| 6 | 8 |
| 7 | 3 |
| 8 | 2 |
| 9 | 12 |
| 10 | 4 |
| 11 | 3 |
| 12 | 5 |
| 13 | 2 |
| 14 | 4 |
| 15 | 3 |
| 16 | 6 |
Explain how the sample of 16 students could have been obtained from the four programs at the college using stratified sampling.
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