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MSU - Jus 240 - Class Notes - Week 2

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MSU - Jus 240 - Class Notes - Week 2

School: Montclair State University
Department: Justice Studies
Course: Statistics for Social Research
Professor: Venezia Michalsen
Term: Fall 2016
Tags: Stats and 240
Name: Statistics 240, Week 2 Notes
Description: Chapter 3: Organizing, Displaying, and Presenting Data
Uploaded: 09/19/2016
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background image Chapter 3: Organizing, Displaying, and Presenting Data    Data Distributions: Frequencies, Proportions, and Percentages   •  Univariate (One variable)   •  Counts or frequency is the number of times a particular characteristic appears in a data set   o  Ex. 24 people in a classroom. 22 people have iphones whereas the other 2 have androids. The  frequency for iphone would be 22 and the frequency for android would be 2.  •  Proportion is a form of frequency that range from 0.00 to 1.00  o  Using the example listed above of iphones and android, the proportion of the iphone is .92  (number of frequency (22) divided by the total sample size (24)   o  Formula is 𝑃𝑟𝑜𝑝𝑜𝑟𝑡𝑖𝑜𝑛 = !"#$%#&'( !!!"!#$ !"#$%& !"#$   •  Percentage is a form of frequency that ranges from 0.00 to 100.00  o  Using the example listed above of iphones and android, the percentage of the iphone would be  92% (number of proportion (.94) times (x) 100). The percentage of the android would be 8%  (number of proportion (.08) times (x) 100).   o  Formula is 𝑃𝑒𝑟𝑐𝑒𝑛𝑡𝑎𝑔𝑒𝑠 = !"#$%#&'( !!!"!#$ !"#$%& !"#$ × 100   or 𝑃𝑒𝑟𝑐𝑒𝑛𝑡𝑎𝑔𝑒𝑠 = 𝑡ℎ𝑒 # 𝑜𝑓𝑝𝑟𝑜𝑝𝑜𝑟𝑡𝑖𝑜𝑛 × 100  •  Cumulative   o  A frequency, proportion, or percentage obtained by adding a given number to all numbers below  it   v   Example:  Most serious arrest charge   cf  cp  pct  cpct  Violent offense   13,938  13,938  .025 (13,938/55,903)  0.25 (13,938/55,903)  24.93 (13,938/55,903 x 100)  24.93  Property offense   16,241  30,179 (add 13,938+ 16,241)  .29 (16,241/55,903)  .54 (30,179/55,903)  29.05 (16,241/55,903 x 100)  53.98  Drug Offense  18,220  48,399 (add 30,179 + 18,220)  .33 (18,220/55,903)  .87 (48,399/55,903)  32.59 (18,220/55,903 x 100)  86.57  Public-Order Offense   7,504  55,903 (add 48,399 + 7,504)  .13 (7,504/55,903)  1.00 (55,903/55,903)  13.42 (7,504/55,903 x 100)  99.99  N=  55,903    1.00 (total of ^)    99.99 (total of ^)    v   For cpct violent offense: (13,938/55,903 x 100), property offense: (30,179/55,903 x 100),  drug offense: (48,399/55,903 x 100), public-order offense: (55,903/55,903 x 100)   v   Don’t forget to round up if its 5 or higher!!!   •  Bivariate (Two variables)  Graphs and Charts  

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School: Montclair State University
Department: Justice Studies
Course: Statistics for Social Research
Professor: Venezia Michalsen
Term: Fall 2016
Tags: Stats and 240
Name: Statistics 240, Week 2 Notes
Description: Chapter 3: Organizing, Displaying, and Presenting Data
Uploaded: 09/19/2016
2 Pages 4 Views 3 Unlocks
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