STATISTICS AND PROBABILITY

2. Out of 40 examinees in Mathematics, the teacher said that those who belong to the upper quartile will be exempted in the next exam. If Loren wants that exemption, which of the following should she do? A. Loren should score at least 38 points. C. Loren should rank 30th above her classmates. B. Loren should score at most 38 points. D. Loren should rank 30th below her classmates. 3. Refer to item no. 2. If Loren got a score of 47, and 2 students scored above her, what does this mean? A. Her score is in the lower quartile. B. Her score is in the upper quartile. C. Her score is in the 95th percentile. D. Her score is in the 5th percentile. For numbers 4-5, consider the following Third Quarter Grades of 13 students in Mathematics 10 below. 95 75 80 88 92 91 90 99 85 84 77 79 97 78 94 4. The upper quartile in the score distribution can also be interpreted as A. Three students scored below 94. B. Eleven students scored above 94. C. Three students scored above and eleven students scored below 94. D. Eleven students scored below and three students scored above 94. 5. If Jovan's grade is equal to 5th Decile, it means that ... A. He surpassed 5 students. C. He surpassed 7 students. B. He surpassed 6 students. D. He surpassed 8 students. Direction: Select the letter of the correct answer and write legibly to the provided space in each item. For numbers 1-3, refer to the following data. In a math quiz, the following 7 students got the following scores: Learner Score Alfert Alexander 9 Rowell Hero 2 Rainier Ryan 3 Cleo Bhel 6 Alysa Joy 7 Marivic 10 1. What is the second quartile? A. 3 B. 5 C. 6 D. 7 2. What is the 75th percentile? A. 6 B. 7 C. 9 D. 10 3. Who got the score that corresponds to the 25-percentile rank? A. Hero B. Rainier Ryan C. Rowell D. Cleo Bhel For numbers 4-5, refer to the following data. In a survey where 30 learners were asked how many hours per day, they used their cellphones or gadgets, and the following are the results: Number of hours frequency Cumulative Frequency 19 - 21 1 30 16 - 18 29 13 - 15 4 28 10 - 12 6 24 7-9 3 18 4- 6 12 15 1 - 3 3 3 4. What is the 3rd Quartile? A. 9.75 B. 11.75 C. 14.75 D. 17.75 5. What is D2.s? A. 4.625 B. 7.625 C. 10.625 D. 13.62