Number of sunspots versus mean annual level of Lake Victoria Nyanza from 1902 to 1921

Source: R/BSDA-package.R

Data for Exercise 2.98

Victoria

Format

A data frame/tibble with 20 observations on three variables

year

year

level

mean annual level of Lake Victoria Nyanza

sunspot

number of sunspots

Source

N. Shaw, Manual of Meteorology, Vol. 1 (London: Cambridge University Press, 1942), p. 284; and F. Mosteller and J. W. Tukey, Data Analysis and Regression (Reading, MA: Addison-Wesley, 1977).

References

Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.

Examples


plot(level ~ sunspot, data = Victoria)

model <- lm(level ~ sunspot, data = Victoria)
summary(model)
#> 
#> Call:
#> lm(formula = level ~ sunspot, data = Victoria)
#> 
#> Residuals:
#>      Min       1Q   Median       3Q      Max 
#> -10.3781  -4.1691  -0.9618   2.2971  14.7500 
#> 
#> Coefficients:
#>             Estimate Std. Error t value Pr(>|t|)    
#> (Intercept) -8.04176    2.55561  -3.147  0.00558 ** 
#> sunspot      0.41281    0.05275   7.826 3.35e-07 ***
#> ---
#> Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
#> 
#> Residual standard error: 6.466 on 18 degrees of freedom
#> Multiple R-squared:  0.7729,	Adjusted R-squared:  0.7602 
#> F-statistic: 61.24 on 1 and 18 DF,  p-value: 3.348e-07
#> 
rm(model)