Critical values for quick reference during this activity.

Confidence level

0.90 z= 1.645

0.95 z= 1.960

0.99 z=2.576

Start

In a poll of 1000

randomly selected voters in a local election, 324

voters were in favor of fire department bond measures.

What is the sample proportion p^

?

What is the margin of error m

for the 90%

confidence level?