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# Data Journalism - Start working with Data

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Data Journalism lecture - Week 3: Start working with Data - Spreadsheets, basic newsroom math.
Lecture date: 23 Sep 2015
MA in Journalism
National University of Ireland, Galway

Title slide image from The Data Journalism Handbook

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### Data Journalism - Start working with Data

1. 1. DATA JOURNALISM Dr. Bahareh Heravi Bahareh.Heravi@insight-centre.org Week 3 Start working with Data
2. 2.       START  WORKING  WITH  DATA
3. 3. What to look for in data? Trends Contrast Outliers Source:  infogram  training
4. 4. Start  working  with  Excel     Sort  and  Filter     Simple  math  func9ons:    Sum    Average    Median     Rate     Percentage  change
5. 5. Sort  and  Filter
6. 6. Open  CSO   Crime  Sta9s9cs     hBp://www.cso.ie/px/pxeirestat/Sta9re/SelectVarVal/deﬁne.asp? MainTable=CJQ03&ProductID=DB_CJ&PLanguage=0&Tabstrip=&PXSId=0&SessID=226 1873&FF=1&grouping1=201110261037123737&grouping2=201110261038503737&r equency=4
7. 7. Simple  math  func9ons:    Sum    Measures  of  centrality
8. 8. Sum     To  add  up  a  set  of  numbers.
9. 9. Measures  of  Centrality     Average  (mean):     Total  of  the  value,  divided  by  the  numbers  of  value     Median:     The  middle  value  of  an  ordered  list  of  values     Mode:   The  most  common  value     hBps://www.mlsplayers.org/salary_info.html
10. 10. Percentage  change     Comparing  new  to  old.     Formula:   (new  –  old)/old            *100
11. 11. Percentage  change:   (new  –  old)/old        *  100     (613  –  574)/574        *  100   0.067                                            *  100  =  +6.79%
12. 12. Rate     Event  happening  per  number  of   popula9on,  e.g.  accident  in  county   per  10,000  people       Formula:   Event  ﬁgure  /  popula;on  *  ‘per’  unit
13. 13. event  ﬁgure/popula9on  *  ‘per’  unit     613  /  250,653  *  100,000  =  244     613  /  250,653  *  1,000  =  2.44   Popula9on  of  Galway?   CSO
14. 14. Hands-­‐on/Exercise:     1-­‐  Percentage  change  of  thej  crime  between  2014   Q1  and  2015  Q1  for  all  Garda  division  in  Ireland.     2-­‐  Rate  of  thej  crimes  in  all  coun9es  in  Ireland   (with  respect  to  the  listed  Garda  divisions).       Tip:  For  Crime  rate  look  for  popula;on  sta;s;cs  in   CSO,  try  to  merge  the  two  tables,  and  not  to  copy   and  paste  each  ﬁgure  manually.
15. 15. Resources:     Data  Journalism  Handbook,  Chapter:   “Understanding  Data”.     Newsroom  Math  Cheat  Sheet,  by  Steve  Doig     Data  Smart  book,  John  Foreman.
16. 16.     TOOLS
17. 17. Fusion     Tables
18. 18.   QuesGons?           @Bahareh360   Bahareh.Heravi@insight-­‐centre.org