# Data revision hw

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a Rewrite the following data in ascending order. 56 52 61 63 43 44 44 72 70 38 55 60 62 59 68 69 74 84 66 53 71 64 b What is the mode? ¢ What is the median for these scores? d Calculate the range. 2. A Year 7 group was asked how many hours TV watched (hours) No. of students of television they watch in a week. The 8 5 results are given in the table. 9 8 a How many students participated in the 10 14 survey? 1 8 b What is the total number of hours of 12 television watched? ¢ Find the mean number of hours of television watched. 3. The number of students in the library is recorded hourly, as 14 5 displayed in the graph. g 121 ? a How many students entered the library when it first opened? § 104——¢ b How many students were in the library at 8 hours after E 8 - t opening? S 61— s ¢ If the library opens at 9 a.m., at what time are there the § 4+ O most number of students in the library? S 2- d How many students were in the library at 4 p.m.? 0 T 012345678 Time (hours)
Consider the data 0, 4, 2, 9, 3, 7, 3, 12. State the: a range b mean ¢ median d mode 5. This stem-and-leaf plot shows the ages of a group of people in aroom. giom | Leaf a How many people are in the room? 0 3 5 b What are the ages of the youngest and oldest people? | 17 9 c .For the data presented in this plot, find the: 9 02 2 3 I range il median : J ok iiil mode 4 3 1T 2|2 means 22 6. Two groups of students have their pulse rates recorded as beats per minute. The results are listed here: Group A: 65, 70, 82, 81, 67, 74, L1, 81, 88, 84, 72, 65, 66, 81, 72, 68, 86, 86 Group B: 83, 88, 78, 60, 81, 89, 91, 76, 78, 72, 86, 80, 64, 77, 62, 74, 87, 78 a How many students are in group B? b If the median pulse rate for group A is 76, what number belongs in the 12 ¢ What is the median pulse rate for group B? d Which group has the largest range?