200 out of 369 working parents said that they spend too little time with their children - in a CNN-USA Today survey. Build 99% confidence interval for the proportion of Americans who think they spend too little time with their kids. Use a 90% confidence level.
In a sample of 246 flights, 10 were delayed due to severe weather and 4 were delayed for unexpected maintenance problems. construct a 95% confidence interval for
- The proportion of flights on time
- The proportion of flight delays due to weather