Monthly sunspot activity from 1974 to 2000
Data for Exercise 2.7
Yearsunspot
A data frame/tibble with 252 observations on two variables
average number of sunspots
date
NASA/Marshall Space Flight Center, Huntsville, AL 35812.
Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.
plot(number ~ year, data = Yearsunspot)
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