Topic 2: Frequency Tables, Frequency Distributions & Graphic Presentation - Les Roches - PDF

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Les Roches

Dr. Ahmed Bakri, Dr. Krisztina Soreg & Mr. Antonio Moya

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data analysis data visualization frequency tables statistics

Summary

This document provides an introduction to frequency tables, frequency distributions, and data visualization techniques using bar charts and pie charts. It includes examples and calculations, useful in a data analytics course.

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Topic 2: Frequency Tables, Frequency Distributions and Graphic Presentation Dr. Ahmed Bakri, Dr. Krisztina Soreg & Mr. Antonio Moya o o o o 𝐑𝐞𝐥𝐚𝐭𝐢𝐯𝐞 𝐅𝐫𝐞𝐪𝐮𝐞𝐧𝐜𝐲 𝑭𝒓𝒆𝒒𝒖𝒆𝒏𝒄𝒚 𝑻𝒐𝒕𝒂𝒍 𝒏𝒖𝒎𝒃𝒆𝒓 𝒐𝒇 𝒐𝒃𝒔𝒆𝒓𝒗𝒂𝒕𝒊𝒐𝒏 D C F B B C D C B C B D D F B B C A D C F B B C D C B C B D D F B B C A 1 18 = Question: What is the di...

Topic 2: Frequency Tables, Frequency Distributions and Graphic Presentation Dr. Ahmed Bakri, Dr. Krisztina Soreg & Mr. Antonio Moya o o o o 𝐑𝐞𝐥𝐚𝐭𝐢𝐯𝐞 𝐅𝐫𝐞𝐪𝐮𝐞𝐧𝐜𝐲 𝑭𝒓𝒆𝒒𝒖𝒆𝒏𝒄𝒚 𝑻𝒐𝒕𝒂𝒍 𝒏𝒖𝒎𝒃𝒆𝒓 𝒐𝒇 𝒐𝒃𝒔𝒆𝒓𝒗𝒂𝒕𝒊𝒐𝒏 D C F B B C D C B C B D D F B B C A D C F B B C D C B C B D D F B B C A 1 18 = Question: What is the difference between a chart and a graph? Chart: visual representation of information or data. The purpose is to help viewers understand and analyze information easily Graph: using mathematical connections (equations) to visualize data and analyze relationships and trends Bar chart Focus: simplify data and categorize them by sections, intervals, groups or individuals Goal: depict the structure, organization, size, etc. of data → comparison Time horizon: short, mid-term or none Remember: the length of each bar is proportional to the value they represent Types: horizontal or vertical Don’t do this with the bar charts… Pie chart Focus: displaying data in a circular-shaped graph Goal: depict proportions, ratios, shares, percentages (slices of a “pie) Time horizon: none → static chart Remember: using not more than 5-6 components (slices) and adding the values in separate labels Types: donut plot, 3D pie chart or exploded pie chart Don’t do this with the pie charts… 7 6 6 5 5 Frequency 4 4 3 2 2 1 1 0 A B C Grades D F Frequency distribution is a grouping of quantitative data into mutually exclusive categories showing the number of observations in each class. Frequency Distribution for number of the scores on a statistics quiz. Grades Frequency 50 up to 60 3 60 up to 70 70 up to 80 7 5 80 up to 90 1 90 up to 100 2 Total 18 𝑛 𝑛 𝑛 → i  ( (𝑯−𝑳) 𝒌 − 7 ) Midpoint = (𝐿𝑜𝑤𝑒𝑟 𝑙𝑖𝑚𝑖𝑡+𝑈𝑝𝑝𝑒𝑟 𝑙𝑖𝑚𝑖𝑡) 2

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