ENVX1002 Lecture Notes - Lecture 6: Standard Deviation
24 Jul 2018
School
Department
Course
Professor
Document Summary
Diamonds are the hardest known natural material and one of the world"s major natural resources. Australia has the largest reserves estimated at around 210 million carats. Diamonds are used for jewellery and industrial applications. As each diamond is unique, buyers need to investigate the price point. Diamonds are graded by 4 qualities, known as the 4c"s . Cut (quality of the cut according to proportions, symmetry and polish) Dv is a graphical summary on steroids. Examples include infographics, heat maps and networks. Good data viz tells an interesting story in a visually appealing way. This requires an understanding of both data and design. A numerical summary reduces all the data to 1 simple number (a statistic) However it allows easy communication and comparisons. Major features that we can summarise numerically are: Mean : the average of the data : sum of data / size of data. Median : the middle data point, when data is ordered from smallest to largest.
