Problem-5 Before the presidential debates. it was expected that the percentages of registered voters in favor of various candidates to be as follows. Percentages Democrats 48% Republicans 38% Independent 04% Undecided 10% After the presidential debates, a random sample of 1200 voters showed that 540 favored the Democratic candidate, 480 were in favor of the Republican candidate, 40 were in favor of the Independent candidate, and 140 were undecided. At 95% confidence, test to see if the proportion of voters has changed. Problem-6 Last school year, in the school of Business Administration, 30% were Accounting majors, 24% Management majors, 26% Marketing majors, and 20% Economics majors. A sample of 300 students taken from this year's students of the school showed the following number of students in each major: Accounting 83 Management 68 Marketing 85 Economics 64 Total 300 Has there been any significant change in the number of students in each major between the last school year and this school year? Use 95% confidence level