Suppose you want to determine, with 90%90\% confidence, the proportion of city residents who commute by bicycle. Your estimate must be within 3%3\% of the true proportion. A prior study suggests that 18%18\% of residents commute by bicycle. What is the minimum sample size you should use?

Suppose you want to determine, with 90%90\% confidence, the propo...

Confidence Intervals for Population Proportion: Videos & Practice Problems

Suppose you want to determine, with 90%90\% confidence, the proportion of city residents who commute by bicycle. Your estimate must be within 3%3\% of the true proportion. A prior study suggests that 18%18\% of residents commute by bicycle. What is the minimum sample size you should use?