residents in a neighborhood determine the app...
residents in a neighborhood determine the approximate number of dandelions in each yard. then, they treat some yards with a weed - killing substance. the residents want to answer the question “about how many dandelions are in your yard?” to determine the effectiveness of the weed killer. from which group would it be best to take a sample?\nall residents of the neighborhood\nonly residents who had their yards treated with weed killer\nonly residents who did not have their yards treated with weed killer\nonly residents who still have dandelions in their yards after treatment with weed killer
Answer
# Brief Explanations:
To determine the effectiveness of the weed - killer, we need to compare the number of dandelions before and after treatment. Sampling from all residents of the neighborhood allows for a comprehensive view including both treated and untreated yards, giving a better understanding of the overall impact of the weed - killer. Sampling only from treated yards, non - treated yards, or yards with remaining dandelions after treatment would be a biased sample.
# Answer:
all residents of the neighborhood