ex1613: Flea Beetle Distinction

In Sleuth3: Data Sets from Ramsey and Schafer's "Statistical Sleuth (3rd Ed)"

Description

Data are the measurements from two very similar species of flea beetle.

Usage

ex1613

Format

A data frame with 36 observations on the following 4 variables.

Specimen

specimen identification number

Jnt1

measurement of first joint in micrometers

Jnt2

measurement of second joint in micrometers

Species

a factor with levels "conc" and "heik"

Source

Ramsey, F.L. and Schafer, D.W. (2013). The Statistical Sleuth: A Course in Methods of Data Analysis (3rd ed), Cengage Learning.

References

Lubischew, A.A. (1962). On the Use of Discriminant Functions in Taxonomy, Biometrics 18: 455–477.

Examples

str(ex1613)

Example output

'data.frame':	36 obs. of  4 variables:
 $ Specimen: int  1 2 3 4 5 6 7 8 9 10 ...
 $ Species : Factor w/ 2 levels "conc","heik": 1 1 1 1 1 1 1 1 1 1 ...
 $ Jnt1    : int  191 185 200 173 171 160 188 186 174 163 ...
 $ Jnt2    : int  131 134 137 127 118 118 134 129 131 115 ...

Sleuth3 documentation built on May 2, 2019, 6:41 a.m.