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1. 1. • Statistics is a study or scientific method of collecting,organizing,processing,presenting,a nalyzing,data and drawing a conclusion according to the result of data analysis.• Collection of the data is the beginning stage in the statistical activity. Collecting data can be performed by interview of questionnaire,then continued by one of the following activities ,like counting,measuring,recording data by tallies.
2. 2. TWO TIPES OF STATISTICA DATA• QUANTITATIVE data are obtained from the result of numerical recording(in the form of figures)• QUALITATIVE data are data related to the category of characteristics of an object.
3. 3. MEASURES OF CENTRAL TENDENCY• MEAN of data set is the sum of all data values divided by the number of data• MODE is the value that occurs most frequently• MEDIAN is a measure of central tendency used to analize data.
4. 4. We try survey in class VII Aabout what they are open, used,websites on the internet and howoften they are opened internet andhow many times they went to theWarnet.
5. 5. “HOW OFTEN YOU OPEN INTERNET IN A DAY?”DATA TALLY FREQUENCY X.F 1 IIII IIII IIII 15 15 2 IIII 5 10 3 IIII 4 12 5 II 2 10
6. 6. MEAN,MODE,MEDIAN OF THE FIRST QUESTIONMEAN = SUM OF ALL VALUES NUMBER OF DATA = 15+10+12+10 15+5+4+2 = 47 26 = 1.8MODE = 1MEDIAN = 26 2 = 13
7. 7. THE RESULT IN PIE CHART Four times 8% Three times 15% Once Twice 58% 19%
8. 8. “ HOW OFTEN DO YOU USE INTERNET A DAY ?” DATA TALLY FREQUENCY F.XNEVER(1) IIII IIII 9 9SELDOM(2) IIII IIII IIII 15 30OFTEN(3) II 2 6
9. 9. MEAN,MODE,MEDIA OF THE SECOND QUESTIONMEAN = SUM OF ALL VALUES NUMBER OF DATA = 9+30+6 9+15+2 = 45 26 = 1.7MODE = SELDOM (2)MEDIAN = 22.5 +23.5 2 = 23 =2
10. 10. THE RESULT IN PIE CHART Sales Often 11% Seldom 25% Never 64%
11. 11. “WHAT YOU USED WHEN YOU OPEN THE INTERNET” DATA TALLY FREQUENCY F.XLAPTOP/COMPUTER(1) IIII IIII IIII III 18 18HANDPHONE(2) IIII III 8 16
12. 12. MEAN,MODE,MEDIAN,OF THE THIRD QUESTIONMEAN = SUM OF ALL VALUES NUMBER OF DATA = 18+16 18+8 = 34 26 =1.3MODE = LAPTOP/COMPUTER(1)MEDIAN = 34 2 = 17 =1
13. 13. THE RESULT IN PIE CHART SalesHandphone 31% Laptop/Comput er 69%
14. 14. WHAT WEBSITE YOU OFTEN OPEN IF YOU USE INTERNET?” DATA TALLY FREQUENCY F.XFACEBOOK(1) IIII IIII IIII IIII III 23 23TWITTER(2) IIII IIII II 12 24YOUTUBE(3) IIII IIII I 11 33GAME ONLINE(4) IIII IIII IIII II 17 68FOR IIII IIII 9 45HOMEWORK(5)SEARCH IIII IIII III 13 78INFORMATION(6)DETIK.COM(7) II 2 14WIKIPEDIA(8) II 2 16YAHOO II 2 18
15. 15. MEAN,MODE,MEDIAN OF THE FOURTH QUESTIONMEAN = SUM OF ALL VALUES NUMBER OF DATA =23+24+33+68+45+78+14+16+18 23+12+11+17+9+13+2+2+2 = 319 91 = 3,5MODE = FACEBOOK (1)MEDIAN = 159,5+160,5 = 32O = 320 2 =160 =5
16. 16. THE RESULT IN PIE CHART Detik.com Wikipedia Yahoo Search 2% 2% Messenger Information 2% 15% Facebook 25%For Homework 10% Twitter Game Online 13% 19% Youtube 12%
17. 17. “DO YOUR PARENTS KNOW IF YOU OFTEN OPEN INTERNET ?” DATA TALLY FREQUENCY F.XKNOW (1) IIII IIII IIII IIII 25 25 IIIIDIDN’TKNOW(2) I 1 2
18. 18. MEAN,MODE,MEDIAN OF THE FIFTH QUESTIONMEAN = SUM OF ALL VALUES NUMBER OF DATA = 25+2 26 = 1.04MODE = KNOW (1)MEDIAN = 27 2 = 13.5 Median = 1
19. 19. THE RESULT IN PIE CHART Didnt Know 4% Know 96%
20. 20. THANKS FOR YOUR ATTENTIONThe Man Who Says He Never Has Time Is The Laziest Man. (Lichtenberg) By learning to obey we know to command.