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# Statitiska (mathematic)

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### Statitiska (mathematic)

1. 1. Definition Of Statistics • Statistics is the science that studies how to plan, collect, analyze, interpret, and present data. In short, statistics is a science with respect to data. • Statistika adalah ilmu yang mempelajari bagaimana merencanakan, mengumpulkan, menganalisis, menginterpretasi, dan mempresentasikan data. Singkatnya, statistika adalah ilmu yang berkenaan dengan data.
2. 2. • Data = information obtained from the result of observation or research • Data collection can be performed through interviews / quetionnaries followed by counting, measuring or by recording the data using the tallies • The measures of central tendency consist of mean, mode and median
3. 3. Mean, Mode and Median....... • Mean : the average value of a group • Mode : the value which appears most eften or the value of hingest frequency • Median : the middle value after the data are ordered
4. 4. data can be presented in two forms, namely a table/list and a graph/diagram
5. 5. Table/List Frequency
6. 6. Graph/Diagram 0 1 2 3 4 5 6 Series 1 Series 2 Series 3 0 1 2 3 4 5 6 Series 1 Series 2 Series 3 Sales 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr
7. 7. • A line diagram is used to show the development of a continous condition • In a pie diagram, the size of the central angle of each sector is proportional to the size of tyhe data each category
8. 8. MANFAAT STATISTIKA • Manfaat statistika dalam kehidupan sehari-hari sangat beragam sebagai contoh sederhana: • • Bagi ibu-ibu rumah tangga mungkin tanpa disadari mereka telah menerapkan statiska. Dalam membelanjakan uang untuk kebutuhan keluarganya sering melakukan perhitungan untung rugi, berapa jumlah uang yang harus dikeluarkan setiap bulannya untuk uang belanja, listrik, dll. • • Sebagai mahasiswa, selain statistika dipelajari secara formal sebenarnya kita sudah menggunakannya dalam perhitungan Indeks prestasi. • • Dalam dunia bisnis, para pemain saham atau pengusaha sering menerapkan statistika untuk memperoleh keuntungan. Seperti peluang untuk menanamkan saham. • • Sedangkan dalam bidang industri, statistika sering digunakan untuk menentukan keputusan. Contohnya berapa jumlah produk yang harus diproduksi dalam sehari berdasarkan data historis perusahaan, apakah perlu melakukan pengembangan produk atau menambah varian produk, perlu tidaknya memperluas cabang produksi, dll. Jadi, statistika sebenarnya sangat penting bagi kita, dapat berguna dalam menentukan keputusan meskipun kadangkala penggunaannya tidak kita sadari.
9. 9. Result of our Survey • After we survey to 7A class, we ask them with some question and after that, we collecting the data. and this is the result
10. 10. Lets us discuss the topic • From 29 (absen 3) student in the 7A class, we find the answer and we make a frequency table like this : Vehicles Frequency Mobil Jemputan 5 Motor Pribadi 6 Motor (Diantar Orangtua) 10 Mobil (Diantar Orangtua) 2 Becak 3 Sepeda 0 Kendaraan Umum 0 Jalan Kaki 0
11. 11. vehicles used to go to school (use pie diagram) Mobil jemputan Motor pribadi Motor (Diantar orangtua) Mobil (Diantar Orantua) Becak Sepeda kendaraan Umum
12. 12. to find mean, mode and median. We need some formula : • Mean = sum of all values : number of the data • Modus : by looking the frequency • Median : by looking the middle of the data after we ordered
13. 13. Lets find the answer ! • Mean = 26 : 8 = 3,25 = 3 • The Modus is = Motor (Diantar Orangtua) about 10 students • The Median is = (13 & 14) Mobil Pribadi (Diantar Orangtua)
14. 14. not only asking about vehicles used to go to school, but we ask other question too
15. 15. extracurricular activities they are interested okay, this is the table frequency about their interested on extracurricular Type of extracurricular badminton I C T Football Basket English Scout Lainnya Frequency 8 3 4 4 2 3 2
16. 16. And this is the diagram 0 1 2 3 4 5 6 7 8 9 1 Chart Title Series1 Series2 Series3 Series4 Series5 Series6 Series7 Series8
17. 17. So the mode, mean and median is....... • Mean = 26 : 7 = 3,7 = 4 • Mode = badminton (about 8 student interesting with it ) • Median = (13 & 14) Football / Basket