Critical values for quick reference during this activity.

Confidence levelCritical value0.90

z=1.645

0.95

z=1.960

0.99

z=2.576

270604.2007124.qx3zqy7

Jump to level 1

A poll reported 38%

support for a statewide election with a margin of error of 4.41

percentage points.

How many voters should be sampled for a 99%

confidence interval? Round up to the nearest whole number.

voters=