A teacher has two large containers filled with blue, red, and green beads. She wants her students to estimate the difference in the proportion of red beads in each container.What type of sampling is described in this study?

The teacher is comparing the proportion of red beads in one container with the proportion in a second container. Since the data come from two separate groups of beads, this is two samples, not paired data; the beads are not matched in pairs.

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