7.SP.B.3 Grade 7 · Statistics and ProbabilityInformally assess the degree of visual overlap of two numerical data distributions with similar variabilities, measuring the difference between the centers by expressing it as a multiple of a measure of variability.Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Grade 7.
Play the game: Center and Spreadfree, no sign-up →Data is counted as dots on a line plot before any average is named, so the shape of the data is seen first.
Every page is free and open — nothing to install, no account, and it works on a phone or a classroom board. Every number has its own color: 1 red, 2 orange, 3 yellow, 4 green, 5 blue, 6 purple, 7 brown, 8 pink, 9 cyan, and a number is that many colored dots.
7.SP.A.1A random sample stands for the whole; a biased one does not7.SP.A.2Many samples: estimate the whole and how far off a guess can be7.SP.B.4Compare two groups from random samples using medians and IQRs7.SP.C.5Chance is a number from 0 to 1: place a bag on the line, then build a bag with a given chance7.SP.C.6Run the experiment: predict about how many in 300 draws, watch the fraction settle, find a hidden bag from data7.SP.C.7Probability models: equal-part spinners, a model from observed spins, and when model and data disagree7.SP.C.8Compound events with trees and tables: two coins, a coin and a die, two diceColorMyMath · getridoftheteacher.com · every number has its own color, and a number is that many colored dots. Matching a game to a standard is a judgement call; the official text is at doe.mass.edu.