Chapter 1, Problem 3FIO

Figure 1.15 Example of error bars in a graph.

This graph was adapted from the peacock butterfly research described in Section 1.5.

The researchers recorded the number of times each butterfly flicked its wings in response to an attack by a bird.

The squares represent average frequency of wing flicking for each sample set of butterflies. The error bars that extend above and below the dots indicate the range of values—the sampling error.

Figure It Out: What was the fastest rate at which a butterfly with no spots or sound flicked its wings?