A store manager wants to know the percentage of shoppers who use coupons . He surveys everyone who enters the meat aisle. He finds that 60 percent of shoppers use coupons. Does the sampling method the store manager used support a valid inference
It depends on the size and representativeness of the sample. If the sample is large enough and representative of all shoppers in the store, then the sampling method may support a valid inference. However, if the sample is too small or biased in some way (e.g. only surveying shoppers during a certain time of day), then the sampling method may not support a valid inference.
It seems that the store manager used a convenience sampling method by only surveying shoppers in the meat aisle. While this method might be convenient, it may not be representative of the entire store's shopper population. Therefore, the validity of the inference could be compromised. To ensure a more valid inference, the store manager should consider implementing a random sampling method that covers shoppers from different aisles or time periods.
