Lecture 1 notes

# Lecture 1 notes - Chapter 1 INTRODUCTION 1.1 What is/are...

• Notes
• 4

This preview shows pages 1–4. Sign up to view the full content.

Chapter 1 INTRODUCTION 1.1 What is/are Statistics? Collection and analysis of data. Statistics is ubiquitous. 1.2 Purposes: Descriptive versus Inferential Statistics 1.3 Populations, Samples and Variables 1.4 Statistics and Engineering 1

This preview has intentionally blurred sections. Sign up to view the full version.

1.1 WHAT IS STATISTICS Collections of data. Specially calculated numbers (e.g. averages) that characterize a collection of data. Discipline – a set of methods of inquiry. Ingredients: 1) Collection of data (a) By observation (b) By designed experiment 2) Analysis of the data (a) Graphical and numerical summarization (b) Making decisions and inferences Often we use mathematical models to help with the analysis – this involves a branch of mathematics called probability theory. Key idea is randomness. Some physical laws are deterministic like F = ma or Q = msθ. What about: tossing a coin opinions on gun control life length of a light-bulb The statapult Applet: Red/blue rectangles: selecting random binary digits 2
1.2 PURPOSE OF STATISTICS Descriptive statistics: Methods used to summarize or describe our “collection of data”. Help others to

This preview has intentionally blurred sections. Sign up to view the full version.

This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern