A middle school contains sixth, seventh, and eighth graders, the characteristics define the best sample an equal number of students chosen at random from each grade level. Option C. This is further explained below.
<h3>What is a sample?</h3>
Generally, A sample is a smaller group of data chosen or selected by a researcher from a larger population using a pre-defined selection process.
In conclusion, A middle school has sixth, seventh, and eighth graders; the features determine the optimal sample, which consists of an equal number of students drawn at random from each grade level.
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The gross domestic product<span> (</span>GDP<span>) is one of the primary indicators used to gauge the health of a country's economy. It </span>represents<span> the total dollar value of all goods and services produced over a specific time period; you </span>can<span> think of it as the size of the economy</span>
I believe the answer is: Organizational culture
Organizational culture would create an unique environment for the employees which could influence the performance of the employees.
For example, some companies value human relationship above others. So they require each of the employees to say 'good morning' to one another everytime they come to work.