# Chapter 11 Data Analysis and Statistics - 11.5 Choose the Best Model for Two-Variable Data - 11.5 Exercises - Quiz for Lessons 11.3-11.5 - Page 780: 5

$n\approx204$.

#### Work Step by Step

If the margin of error is $\pm7\%$, then our equation is: $\pm\frac{1}{\sqrt n}\cdot 100\%=\pm7\%=\pm0.07\\\frac{1}{\sqrt n}=0.07\\14.29\approx\sqrt{n}\\n\approx204$.

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.