Representation of data- Summary, Cheat Sheet of Data Representation and Algorithm Design

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sranistics 5.44 Representation of dato. 1. Types of dato. Qualitative Cron - numerical ) + Shot. size » 10, Quantitative: * blood types Cwsmericod. ) A,B, 0, AB continuous. <— coreg. —> | colors ony value m the vonge eg: height (om): 160.9, 160.24 2. Stem - and - leaf diograms. ~ small amounts of discrete data £4» Physics grade: 58,55, 58, 61, 72, 79,97, 67, 61, 77,92, 64, 69, 62 and 53. stem s 6 represents + equal class. “=m Hi a score of 33% + ascending, order a 27 NU leafs + single digits only. ~ ascending order RTI The heights of boys and girls in a year 11 class are given to the nearest em inthe back to back ster and leaf diagram below. Write out the data in full. Ty 8, he ge 6 ome ec : 5,9 7 ers oat lie|n24s Dede econ 165 | ils Boys: 168, 171, 178, 179, 182, 185, 191 Girls: 159, 161, 163, 169, 170, 172, 178, 175, 180 3. Histograms: * continuous dato. discrete. data t90 * numbers are rounded up/down to fit into classes class Givon as 156 eg [Given as 46 159 p_Gieen as 151 158 6 60 , ‘ J T I I [- us "\ 15 155 ny tows lower boundary. upper boundary ! H class mid -value TK chss width Ey Covidpoint) “no gaps. between elumns {SE en ae ° af a : Prequeney = class width ow FR Bo ; Ageosar) — —~ * proportional to BEore5) SOT a Es frequency densty - equeney Y * loss width 4oelo=4 6o+=3 iim inv = frequency per standard interval Fequncy = f.density x dass width a a * assume values are evenly spread in whole class interval