You collect a random sample of size n from a population and calculate a 98% confidence interval. which of the following strategies produces a new confidence interval with a decreased margin of error?
use a 99% confidence level.
use a 95% confidence level.
decrease the sample size.
use the same confidence level, but compute the interval n times. approximately 2% of these intervals will be larger.
nothing can guarantee that you will obtain a larger margin of error. you can only say that the chance of obtaining a larger interval is 0.02.