Answer to Question #277047 in Statistics and Probability for Nandhu rk

Question

Before an increase in excise duty on tea, 800 people out of a sample of 1000 were

consumers of tea. After the increase in duty, 800 people were consumers of tea in a

sample of 1200 persons. Write down the R programming code to test whether the

significant decrease in the consumption of tea after the increase in duty at 1 % level of

significance.

Answer 1

R codes on consumers of tea

Let the tea consumers with x=800,n=1000 be group A

and tea consumers with x=800,n=1200 be group B.

prop.test(x=c(800,800),n(1000,1200), alternative="greater",conf.level=0.01)