ex2414: Amphibian Crisis and UV-B

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

Description

Data frame contains the percentage of unsuccessful hatching from enclosures containing 150 eggs each in a study to investigate whether UV-B is responsible for low hatch rates.

Usage

ex2414

Format

A data frame with 71 observations on the following 4 variables.

Percent

percentage of frog eggs failing to hatch

Treatment

factor variable with levels "NoFilter", "UV-BTransmitting" and "UV-BBlocking"

Location

factor variable with levels "ThreeCreeks", "SparksLake", "SmallLake" and "LostLake"

Photolyase

Photolyase activity

Source

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

References

Blaustein, A.R., Hoffman, P.D., Hokit, D.G., Kiesecker, J.M., Walls, S.C. and Hays, J.B. (1994). UV Repair and Resistance to Solar UV-B in Amphibian Eggs: A Link to Population Declines? Proceedings of the National Academy of Science, USA 91: 1791–1795.

Examples

str(ex2414)

Example output

'data.frame':	71 obs. of  4 variables:
 $ Percent   : num  6 4.7 0.7 1.5 0.8 2.9 3.9 38.7 44 30 ...
 $ Treatment : Factor w/ 3 levels "NoFilter","UV-BBlocking",..: 1 1 1 1 1 1 1 1 1 1 ...
 $ Location  : Factor w/ 4 levels "LostLake","SmallLake",..: 4 4 4 3 3 3 3 4 4 4 ...
 $ Photolyase: num  7.5 7.5 7.5 7.5 7.5 7.5 7.5 2.4 2.4 2.4 ...

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