Originally Posted by

**Morgan82** A sample of construction workers was taken in a large city.

16 of the 150 workers were unemployed.

I found the confidence interval of 6.5% to 14.8%. Mr F asks: Is this a 95% confidence interval? 90%? 99%?

the second part of the question...

The overall unemployment rate is 6.8%.

Based on your confidence interval, is there evidence at the 0.05 level to show that unemployment rate for city construction workers is significantly higher than the overall city rate.

What do I do?