Biologists took a sample of 20 male toads and measured body length (snout-vent length, in mm) of each of them. They also recorded how deep the pitch was of each toad's croak (call, measured in Hz). Larger toads had deeper pitched croaks, as the scatterplot below shows. The graph shows a regression line that can be used to predict the size of a toad based on the pitch of its call. There are two other pairs of lines on this graph: dashed and dotted.29
(a) Which pair of lines (dotted or dashed) shows the 95% confidence band, and which pair of lines shows the 95% prediction band?
(b) Suppose that the call of a toad is heard and it measures 1.300 Hz. Use the graph to estimate an interval that you can be 95% sure includes the snout-vent length of the toad.

Transcribed Image Text:

80- 70 60- 900 1000 1100 1200 1300 1400 Frequency of call (Hz)