1 How is a 94 confidence interval better than a 95 What are

1. How is a 94% confidence interval better than a 95%. What are its draw back vs 95% C.I.

2. How does an increase in sample size affect the upper limit of a confidence interval.

3. When is Fisher\'s z\' used? Why is it necessary to use Fisher\'s z\'?

4. Write a R code to assess the differences using the bootstrapping method for construction of confidence intervals.