What is Fundamental Statistics?

Fundamental statistics is the values describe the character of the data. It includes average, maximum, minimum, median, variance, standard variance, and so on. To begin with, input the following data for now, and then plot them.

x <- c(2,2,3,4,5,6,6,6,6,7,8,9)
y <- c(8,7,7,5,8,5,4,3,4,3,2,1)
plot(x,y)
plot

Calculate Fundamental Statistics

R has the functions to calculate fundamental statistics. Following samples calculate average, maximum, minimum, median, variance and standard variance in order.

mean(x)
max(x)
min(x)
median(x)
var(x)
sd(x)

Calculation of Covariance and Coefficient of Correlation

R can calculate them easily.

var(x,y)
cor(x,y)