Grade/Section: Activity 1.1: Please Correct Me If I'm Wrong! Directions: On the first blank before each number, write C if the pair of hypotheses is correct and N if the pair is incorrect. If incorrect, write the correct ALTERNATIVE hypothesis in symbols on the second blank. On the third blank, write R if it is right-tailed test, L if left-tailed test and T if two-tailed test. 1. In a public market, 65% of the vendors preferred to use plastic over paper bags. After the local ordinance was signed, 80 out of 110 randomly selected vendors preferred plastic over paper bags. Does this indicate that vendors in that public market have less preference in using paper bags? Use 0.05 level of significance. Ho: p = 0.65; Ha: p > 0.65 2. A research found out that 10% of the senior high school students in a certain school are working students. A researcher randomly selected 50 out of 300 students who are working. Is there a percentage increase in the number of senior high school students who are working? Use a = 0.01 level. Ho: p = 0.10; Ha: p = 0.10 3. A researcher claimed that 65% of elementary students would rather play than read books during break time. Another researcher was assigned to verify the claim. He randomly selected 300 students. Two hundred fifty- four (254) of them said they would rather play during break time than read books. At 0.10 level, is there enough evidence to conclude that the percentage of elementary students who would rather play than read books has changed to 65%? Ho: p = 0.65; Ha: p = 0.65 4. Before the national elections, 75% of the voters in a certain town said that they preferred older senatorial candidates running for senatorial positions than younger candidates. After a certain survey was conducted, 800 out of 1,300 randomly selected voters preferred older senatorial candidates. Does this claim indicate that voters in that town have a greater interest in older candidates than in younger ones? Use a = 0.05. Ho: p = 0.75; Ha: p < 0.75 5. The school principal in a certain private junior high school claimed that 45% of all students are in favor of the new PE uniform. A research teacher asked his students to verify the claim. With this, 265 out of 400 randomly selected students agreed to the new PE uniform. Using a = 0.10 level, is there enough evidence to conclude that the percentage of students who are in favor of the new PE uniform is different from 45%? Ho: p = 0.45; Ha: p < 0.45