Statistika Minggu Pertama 1

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02/11/2020

1 Pengantar perkuliahan

REFERENCES

• Statistics : Principles and Methods - Richard Johnson and Gouri Bhattachanyya

• Handbook od Statistical Methods for Engineers and Scientists – Harrison M. Wadsworth, 1990

• Applied Statistics (4^thedt) – Neter Wasserman Whitemore, 1993

• Applied Statistical Methods – Irving W. Burr, 1974

• Multivariate Data Analysis (5^thEdt) – Joseph F Hair; Rolph E. Anderson; Ronald L. Tatham;

William C. Black, 1998

• Metode Numerik untuk Teknik – Steven C. Copra; Raymond P. Canale, 1991

• Statistik – Teori dan Aplikasi (eds 5) – J. Supranto, 1989

• Statistik Induktif – Djarwanto; P. Subagyo,

• Etc.

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02/11/2020

2 What is statistics?

–General meaning

•Collection of facts or data – numerical results

•A branch of knowledge

–Scientific meaning – the science of collection, condensation, analysis, interpretation

–Objectives – estimation, prediction, and decision making

–Risks? Errors might occur (should be accepted) – statistical methods enable to measure or control such error

Statistics, as a subject, provides a body of principles and methodology for designing the process of data collection, summarizing and interpreting the data, and drawing conclusions or generalities.

Why use statistics?

–Universality of variation in all areas

–Estimation, prediction, decision making, etc.

(statistics is the science of making decisions the face of uncertainty)

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02/11/2020

3

Statistics in our everyday life?

Statistics in aid of scientific inquiry?

Statistik

Adalah suatu metode pengolahan data yang diperoleh dari suatu

operasi/kegiatan yang berulang-ulang

Operasi dilakukan melalui:

Obervasi

Eksperimen

Pengukuran

Dalam statistik diperlukan DATA

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4 Data

Tipe:

Angka

Numerik

Contoh:

Syarat lulus ujian adalah skor 60.

Sampel beton yang diambil 80% memenuhi syarat.

Mutu baja yang digunakan 90% sesuai standar, dengan kuat tarik rata-rata sebesar 350 MPa, sedang 5% ditolak karena f_y< 300 MPa dan 5%

perlu dilakukan kajian ulang.

Statistik

Pemakaian statistik

–Descriptive Statistics

•Peranan statistika berkaiatan dengan pengambilan keputusan

•Statistik Induktif

–Inferential Statistics

•Peranan statistika hanya terbatas melukiskan dan analisis tanpa membuat kesimpulan