The phrase "You dirty rat" does rats a disservice. In a recent study, rats showed compassion that surprised scientists. They observed that 25 of the 35 rats in the study freed another trapped rat in their cage, even when chocolate served as a distraction and even when the rats would then have to share the chocolate with their freed companion. (Rats, it turns out, love chocolate.) Rats did not open the cage when it was empty or when there was a stuffed animal inside, only when a fellow rat was trapped. We wish to use the sample to estimate the proportion of rats to show empathy in this way. UseStatKeyor other technology to create a bootstrap distribution. Describe the shape and center of the bootstrap distribution. What is the estimated standard error?

Using technology, we see that the bootstrap distribution is bell-shaped and centered approximately at 0.285. We also see that the standard error is about 0.076.

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