cloud: The Cloud Seeding Data

In ACSWR: A Companion Package for the Book "A Course in Statistics with R"

Description

Chambers, et al. (1983), page 381, contains the cloud seeding data set. Rainfall in acre-feet for 52 clouds are measured, 50% of which have natural rain (control group) whereas the others are seeded. We need to visually compare whether seeding the clouds lead to increase in rainfall in acre-feet.

Usage

data(cloud)

Format

A data frame with 26 observations on the following 2 variables.

Control

Rainfall in acre-feet for 26 clouds are measured which had natural rain, that is, control group

Seeded

Rainfall in acre-feet for 26 clouds are measured which had seeded rain

References

Chambers, J.M., Cleveland, W.S., Kleiner, B., and Tukey, P.A. (1983). Graphical Methods for Data Analysis. Wadsworth and Brooks/Cole.

Examples

data(cloud)
stem(log(cloud$Seeded),scale=1)
stem(log(cloud$Control),scale=1)

Example output

  The decimal point is at the |

  1 | 4
  2 | 09
  3 | 457
  4 | 57889
  5 | 33556678
  6 | 1269
  7 | 449


  The decimal point is at the |

  0 | 0
  1 | 66
  2 | 49
  3 | 123344679
  4 | 2456
  5 | 015889
  6 | 7
  7 | 1

ACSWR documentation built on May 2, 2019, 6:53 a.m.