Learning goals: Teacher Facing Apply reasoning about center and spread to determine whether two populations are likely to be meaningfully different, and explain (orally and in writing) the reasoning. Coordinate (orally) visual displays of data with descriptions of shape, measures of center, and measures of spread. Determine what information is needed to solve problems about using samples to compare populations. Ask questions to elicit that information. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 7.8 Probability and Sampling, Grade 7.