ex1509 {Sleuth3}

Sunspots

Description

The data are the annual sunspot counts in each year from 1700 to 2010.

Usage

ex1507

Format

A data frame with 311 observations on the following 2 variables.

Year

year in which sunspots were counted, from 1700 to 2010

Sunspots

the number of sunspots observed in a year

Source

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

References

SIDC-Solar Influences Dta Center, http://sidc.oma.be/sunspot-data/ (July 15, 2011).

Examples

str(ex1509)