Grouping data stem and leaf diagrams
- 1. October 4, 2012 Grouping Data 1. Stem and leaf diagrams. Next
- 2. Explanation October 4, 2012 These are the maths test 69 58 68 80 81 70 49 53 68 47 63 59 65 61 57 54 57 40 75 63 results for 30 students. 81 65 44 76 61 70 52 64 59 74 You can show this data is in a stem and leaf diagram. The results are either in 4 4 9 0 7 the 40s, the 50s, the 60s, the 70s or the 80s 5 8 9 74 7 2 3 9 Write these ‘tens’ 6 9 3 5 851 14 8 3 figures on the stem. 7 6 0 054 The leaves are made up from the units that follow 8 1 0 1 each ’10’ number. More Next
- 3. Explanation October 4, 2012 These are the maths test 69 58 68 80 81 70 49 53 68 47 63 59 65 61 57 54 57 40 75 63 results for 30 students. 81 65 44 76 61 70 52 64 59 74 You cana kind this data is inchart. and leaf diagram. This is show of frequency a stem It enables you to find useful information. 4 4 9 0 7 The modalneed tois thein You results are either The now group write 60-69 group. 50s, the in out the units numbers the 40s, the ascending order 80s 60s, the 70s or the 5 8 9 74 7 2 3 9 As there are 30 results, the medianleaf diagrams Stem and result is mid Write these ‘tens’ 6 9 3 5 851 14 8 3 way between the 15this. are written the stem. and figures on out like th 16th. 7 6 0 054 Starting at 40, the 15th up The leaves are made result is 63, as is the 16th, from the units that follow 8 1 0 1 so the ’10’ number. each median is 63. More End