Refer to Exercise 3.4.32 to answer (a) and (b): 

a. If the sample size had been 8,000, how would the widths of the 90%, 95%, and 99% confidence intervals be affected? 

b. If the sample size had been 100, how would the widths of the 90%, 95%, and 99% confidence intervals be affected?

Data from Exercises 3.3.32 

A 2019 Ipsos poll of 4,000 U.S. adults found that 65% play video games on their computer, gaming console, or smartphone.