Allometry is the area of biology that studies how different parts of a body grow in relation to other parts. Figure 2.62 shows a scatterplot comparing the length and width of petals of irises.

Figure 2.62

(a) Does there appear to be a positive or negative association between petal width and petal length? Explain what this tells us about petals.

(b) Discuss the strength of a linear relationship between these two variables.

(c) Estimate the correlation.

(d) Are there any clear outliers in the data?

(e) Estimate the width of the petal which has a length of 30 mm.

(f) There are at least two different types of irises included in the study. Explain how the scatterplot helps illustrate this, and name one difference between the types that the scatterplot makes obvious.

Transcribed Image Text:

25 20 - 15 10 5 - 10 20 30 40 50 60 70 Petal Length (mm) Petal Width (mm)