Question: Replace the scenario about the balloon in Example 2 with your own real world scenario. To obtain random samples from a text file, without replacement, means that once a line has been randomly selected (sampled) it cannot be selected again.Sampling with replacement means the distribution of the number of successes in the sample (of fixed size) is Binomial. A 10-year-old in Kansas attached a note to a bunch of helium balloons and sent them off into the sky. We'll investigate how to take random samples with replacement. That is, if an observation is selected once, it does not prevent it from being selected again. An intra-aortic balloon pump (IABP) is a device that helps your heart pump more blood. You may need it if your heart cannot pump enough blood for your body. The information in this guide is accurate at the time of publication but may be subject to change. Check for the most up-to-date information at schools.nyc.