Key Idea: Margin of Error

The margin of error represents the range of possible values around a measured or estimated value, reflecting uncertainty.

📌 General Rule:

Estimate±Margin of Error

• The result is usually expressed as “between” two values:

Lower Bound = Estimate−MarginUpper Bound=Estimate+Margin

Why this matters for the SAT:

Margin of error appears in statistics and probability problems. Knowing how to compute and interpret it ensures accurate conclusions about data ranges or confidence intervals.