R Notebook

#Sample size

library(gtsummary)
library(dplyr)

#Annual Canadian Lynx trappings 1821–1934

head(lynx)

Time Series:
Start = 1821 
End = 1826 
Frequency = 1 
[1]  269  321  585  871 1475 2821

data(lynx)

class(lynx)

[1] "ts"

start(lynx)

[1] 1821    1

end(lynx)

[1] 1934    1

frequency(lynx)

[1] 1

plot(lynx)

summary(lynx)

   Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
   39.0   348.2   771.0  1538.0  2566.8  6991.0 

Interpretation:

Min (39.0): The smallest observed value in your dataset.

1st Quartile (348.2): 25% of the data values are less than or equal to 348.2.

Median (771.0): The 50th percentile; half the data values are below 771.0 and half are above.

Mean (1538.0): The arithmetic average; noticeably higher than the median, suggesting a right-skewed distribution.

3rd Quartile (2566.8): 75% of the values are less than or equal to 2566.8.

Max (6991.0): The largest observed value.

👉 Overall interpretation: The data are positively skewed (since the mean > median, and the maximum is much larger than the quartiles). Most values cluster between ~350 and ~2600, but a few large values (outliers) push the mean up to ~1538.