Activity:

z A high school teacher grades exams, 50%; oral recitation, 15%; quizzes, 15%; attendance, 10%; and group activities, 10% . A student had grades of 89, 77, 85, 97, and 90, respectively, for exams, oral recitation, quines, attendance, and group activities. Find the student's final average. Use the weighted mean. 3. The number of stories in the 9 tallest buildings in Quezon City are 38, 44, 40, 32, 56, 64,42. 61,70 Find the range, variance, and standard deviation. S. A teacher elves a 20polnt test to 10 students. The scores are shown here. 18, 15, 12, 6, 3, 2, 3, 5, 20, 10 Find the following: (a) percentile rank of a score 0! 9 (bl percentile rank of a score of 19 (c) values of 0.1. 0.2. and Ch