Answer:
an equal number of students chosen at random from each grade level
In statistics, a sample is a little amount that reveals how the remainder is or should be.
Statistics is the study of collection, analysis, interpretation, and presentation of data or to discipline to collect, and summarise the data.
A middle school contains sixth, seventh, and eighth graders each grade level contains approximately the same number of students the principal wants to find the answer to a survey question affecting each student in the school.
An equal number of pupils from each grade level were chosen at random.
We could simply collect the information of all the pupils by randomly picking some students such that there are an equal number of students from each grade.
More about the statistics link is given below.
https://brainly.com/question/10951564
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