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Practice and Appil I. Circle the letter that corresponds to the set of numbers which shows lesser variability. 1. a. 20 70 90 4. a. 50 110 111 7. a. 208 250 358 10. a. 35 b. 30 70 80 b. 20 70 90 b. 50 150 350 70 b. 205 230 260 2. a. 20 22 24 5. a. 10 17 25 a. 75 85 90 b. 14 21 34 b. 106 115 117 b. 11 13 14 3. a. 13 25 28 6. a. 23 27 30 9. a. 34 35 36 b. 110 111 112 b. 20 28 92 b. 33 42 45 II. Find the range of each set of ungrouped data. 11. 7, 23, 33, 38 13. 90, 110, 101, 140 15. 158, 262, 225, 248, 237 12. 28, 22, 27, 30 14. 61, 62, 65, 68 16. 98, 96, 95, 104, 118possible mark was 100. following table shows the marks gained in an arithmetic examination by 100 pupils. The maximum 1. Complete the table. 2. Identify: a. i Marks Frequency True Limits b. total frequency 91-100 5 81-90 11 c. lower limit of the interval 31-40 71-80 14 61-70 17 d. true upper limit of the interval 71-80 51-60 23 41-50 14 31-40 8 3. How many pupils got marks less than 70.5? 21-30 4 11-20 NON - 4. How many pupils got marks greater than 50.5? 1-10 N = 100 5. What percent of the pupils got score lower than 61.5?Find the mean, median, and mode for each data set. 1. 67, 89, 93, 77, 84 2. 32, 43, 31, 52, 28, 39 5 . X 7. X 13.5 2 3. 13, 11, 10, 12, 14, 9, 11, 8, 11 13.7 95-109 8 6 80-94 14.0 10 22 65-79 12 4. 10.5, 7, 10, 9.1, 10, 9.1 14.1 29 50-64 45 14.2 12 35-49 20 14.8 4 20-34 5 6. X 8. X 65-69 60-64 8 55-59 NN NN NN 31 50-54 15 45-49 12 6 40-44 7 35-39 4 20-34