Chi- squared test :

   To test independence of the row and column variable.

   p-value is calculated from the asymptotic chi-squared distribution of the test statistic

   H0 : Two Variables are independent.

   H1 : Two Variables are relative.

   R Function :test()

Fisher Test :

   Provides an exact test of independence.

   R Function :test(x)

   x - two dimensional contingency table in matrix form.

#Independence test
#Chi-Squared Test
#Input
attach(mtcars)
x<-mtcars$mpg
y<-mtcars$hp

#Table Function
tab<-table(x,y)
print(tab)
chisq.test(tab)

#Fisher Test
fisher.test(tab)