4.8.B—Justify a claim based on a confidence interval for the difference between two population means

Justify a claim based on a confidence interval for the difference between two population means.

• A confidence interval for the difference between two population means provides an interval of values that may serve as convincing evidence to support a particular claim about the difference in two population means. For example, if the interval contains 0, then there is insufficient evidence to conclude there is a difference between the two population means. If the interval does not contain 0, then there is sufficient evidence to conclude there is a difference between the two population means. 137 Inference for Quantitative Data: Means UNIT 4