Question

a teacher asks students to list the math lessons they learned on nine random school days in the past month. she evaluates the students performance on this assignment to get a general picture of how well students are taking notes. this teachers method is an example of
o systematic random sampling.
o simple random sampling.
o convenience sampling
o stratified sampling.

Explanation:

1. Systematic random sampling: Involves selecting elements at regular intervals from an ordered population. Here, no such interval - based selection is mentioned.
2. Simple random sampling: Each element in the population (school days in this case) has an equal chance of being selected. The teacher randomly selects nine school days, which fits this method.
3. Convenience sampling: Selects elements that are easily accessible. There is no indication of convenience - based selection.
4. Stratified sampling: Divides the population into subgroups (strata) and samples from each stratum. No such stratification is described.

Answer:

simple random sampling.