1. **Stating the problem:** We need to identify the sampling technique used by the manager who asked some shoppers at the shop exit how much they had spent. 2. **Understanding sampling techniques:** Common sampling techniques include: - **Random sampling:** Every member of the population has an equal chance of being selected. - **Systematic sampling:** Selecting every nth member from a list or queue. - **Stratified sampling:** Dividing the population into groups (strata) and sampling from each. - **Convenience sampling:** Sampling those who are easiest to reach. - **Quota sampling:** Sampling to fill quotas for certain groups. 3. **Analyzing the scenario:** The manager stood at the shop exit for an hour and asked some shoppers who passed by. This means: - The sample consists only of shoppers who exited during that hour. - The manager did not select shoppers randomly or systematically from the entire population. - The sample is based on convenience (those who were available and willing to answer). 4. **Conclusion:** The sampling technique used is **convenience sampling** because the manager sampled shoppers who were easiest to access at the exit during a specific time. Final answer: **Convenience sampling**.