CHECKING YOUR UNDERSTANDING Choose the letter of the correct answer. Then write it on a separate sheet of paper. 1. Given the data in the Activity: “Daily Allowance of Grade 7-Diamond students" what is the variance? A. 6.49 B. 20.57 C. 415.1 D. 423.36 2. With the same data in the Activity, what is the standard deviation? A. 49 B. 20.57 C. 415.1 D. 423.36 Use this table for #3-5 Scores f Х fx X (X-X) 11.2 9 48 432 36.8 10 43 36.8 6.2 430 342 f(x-x)? 1128.96 384.4 12.96 144.4 464.64 1142.64 (X-X)? 125.44 38.44 1.44 14.44 77.44 190.44 9 38 46 - 50 41 45 36 - 40 31 - 35 26 - 30 21 - 25 36.8 1.2 10 33 330 36.8 -3.8 6 28 168 36.8 -8.8 - 13.8 23 36.8 6 50 138 1840 3. What is the f(x - x)?? A. 3278 B. 3278.4 C. 3278.64 D. 3278.96 4. What is the variance? A, 1.78 B. 8.12 C. 65.56 D. 66.90 5. What is the standard deviation? A. 1.78 B. 8.12 C. 65.56 D. 66.90​