A researcher believes that Business majors are better writers of business memos vs. English majors. To test this hypothesis, she gives a test to one group of Business majors and another group of English majors. The test is graded on a 100-point scale, so higher scores are better. There are 9 graduates of each major in the study. What are Ho and Ha? O Ho: mu(Business]>mu(English); Ha:mu(Business)=mu(English) O Ho: mu(Business)=mu(English): Ha:mu(Business)mu(English) O Ho: The distribution of test scores is the same for both majors; Ha: The distribution of scores is higher for Business majors. QUESTION 18 A researcher believes that Business majors are better writers of business memos vs. English majors. To test this hypothesis, she gives a test to one group of Business majors and another group of English majors. The test is graded on a 100-point scale, 50 higher scores are better. There are 40 graduates of each major in the study. What are Ho and Ha? (O Ho: mu(Difference)=0; Ha:mu(Difference not = 0 O Ho: mu(Business)=mu(English]: Ha:mu(Business)mu(English]: Ha:mu(Business)=mu(English) O Ho: mu(Business)=mu(English]: Ha:mu(Business)>mu(English) QUESTION 19 A researcher believes that students will be better writers after they take a business writing course. To test this hypothesis, she gets a set of students to write a memo just before they take a business writing course. They then write another memo at the end of the course. She scores both memos on a 20-point scale (higher scores are better) and subtracts the earlier score from the later score. There are 40 students in the study. What is the name of the appropriate statistical test? O T-test for single mean O T-test for difference of matched pairs O T-test for two means O Wilcoxon Signed Rank Test on differences