\f5. Inorderto develop effective marketing strategies, it is useful to know the characteristics of your customers. A study compared the demographics of people using the internet to prepare for a trip versus others who do not use it. Among internet users, 493 reported having incomes of less than S 50,000 while 378 earned S 50,000 and more. The corresponding numbers for those who did not use the internet to prepare their trip were 477 and 200. Do a hypothesis test to compare income between Internet users and others and give a 95% confidence interval of the difference between the two proportions