To assess the learning outcomes of a Statistic course, 5 students are chosen at random from each of the 30 Statistics classes and asked to take an assessment test. What is the sampling method used here

simple random sampling

Step-by-step explanation:

In statistics, when a subset of individuals known as sample chosen from a population by a random selection of individuals such that the chances of selecting each individual is same, then the sampling method is called simple random sampling method.

Given: To assess the learning outcomes of a Statistic course, 5 students are chosen at random from each of the 30 Statistics classes.

here chances for selectin students is same.

The sampling method used here : " simple random sampling "

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8

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