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

systematic random sampling
simple random sampling
convenience sampling
stratified sampling

Explanation:

Identify the sampling method

Using the Simple Random Sampling, Systematic Sampling, Convenience Sampling, and Stratified Sampling knowledge points

• The teacher selects "nine random school days" from the past month to evaluate.
• Every school day in the past month has an equal chance of being selected, and the selection of one day does not affect the selection of another.
• There is no specific pattern or interval (which rules out systematic sampling).
• There are no distinct subgroups or strata being divided first (which rules out stratified sampling).
• The days are chosen randomly rather than based on ease of access (which rules out convenience sampling).
• Therefore, choosing nine random days from the population of all school days in the past month is an example of simple random sampling.

Answer:

• systematic random sampling
• simple random sampling (Correct answer)
• convenience sampling
• stratified sampling