One hundred year record of worldwide seismic activity(1770-1869)

Data for Exercise 6.97

Earthqk

Format

A data frame/tibble with 100 observations on two variables

year

year seimic activity recorded

severity

annual incidence of sever earthquakes

Source

Quenoille, M.H. (1952), Associated Measurements, Butterworth, London. p 279.

References

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

Examples

EDA(Earthqk$severity)
#> [1] "Earthqk$severity"

#> Size (n)  Missing  Minimum   1st Qu     Mean   Median   TrMean   3rd Qu 
#>  100.000    0.000    0.000   69.250   97.970   94.000   96.700  122.000 
#>     Max.   Stdev.     Var.  SE Mean   I.Q.R.    Range Kurtosis Skewness 
#>  216.000   44.704 1998.413    4.470   52.750  216.000    0.067    0.431 
#> SW p-val 
#>    0.082 
t.test(Earthqk$severity, mu = 100, alternative = "greater")
#> 
#> 	One Sample t-test
#> 
#> data:  Earthqk$severity
#> t = -0.4541, df = 99, p-value = 0.6746
#> alternative hypothesis: true mean is greater than 100
#> 95 percent confidence interval:
#>  90.54745      Inf
#> sample estimates:
#> mean of x 
#>     97.97 
#>