A researcher wants to study math achievement in sixth graders. The researcher obtains a list of all elementary school districts in the state, randomly selects 5 percent of the districts, and administers achievement tests to all sixth graders in these districts. This sampling method is called sampling.

This sampling method is called cluster sampling.

Explanation:

In cluster sampling, the researcher will first divide the population into separate groups. The researcher in the passage focused on sixth graders of a certain state as his subjects. The next step is to select a simple random sample of clusters from that population. In this case, the researcher randomly selected 5% of the districts in the state, and administered the achievement test to their sixth graders. Therefore, we can safely say he used cluster sampling.

you so !

it´s related to his charming character.

beauty is not everything, although we can joke that girls only care about the physical or material aspect, the truth is that a real woman looks at more important things, besides intelligence and personality, there are other attitudes that make irresistible to men who are 'unattractive'.

for example develop your sense of humor.