Identifying Random Sampling

Here we will build on our understanding of random sampling and how to apply it to choose members of an effective statistical sample.Suppose you were handed a bag full of a large number of small, unknown items, and asked to try to identify the contents without looking in the bag.  Naturally the easiest way to investigate would be to reach inside and grab a handful to see what turned up.  If you reached in and then pulled out a handful of nothing but marbles of various colors off the top, you’d quite reasonably state that this must be a bag of marbles.

Grade 7 Material from CK-12

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Use data from a random sample to draw inferences about a population with an unknown characteristic of interest. Generate multiple samples (or simulated samples) of the same size to gauge the variation in estimates or predictions.