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Lecture note Elementary Statistics - PHD. Pham Thanh Hieu

After studying this chapter you will be able to: Introduction to statistics, methods for describing data, probability, discrete probability distributions, the normal probability distribution, confidence interval, hypothesis testing. | Lecture note Elementary Statistics - PHD. Pham Thanh Hieu THAI NGUYEN UNIVERSITY OF AGRICULTURE AND FORESTRY INTERNATIONAL TRAINING AND DEVELOPMENT CENTER ADVANCED EDUCATION PROGRAM STA13 Elementary Statistics LECTURE NOTE LECTURER PHD. PHAM THANH HIEU Picture best relevant 1 to the subject Chapter 1 Introduction to Statistics 1.1. Introduction Many problems arising in real-world situation are closely related to statistics which we call statistical problems. For example A pharmaceutical company wants to know if a new drug is superior better to already existing drugs or possible side effects. How fuel efficient a certain car model is Is there any relationship between your GPA Grade Point Average and employment opportunities If you answer all questions on a T F or multiple choice examination completely randomly what are your chances of passing What is the effect of package designs on sales So we can see that statistics is the science originated from the real-world problems and it plays important role in many disciplines of economy natural and social problems. The questions here are 1. What is statistics 2. Why we study statistics 1.2. Goal of Course To learn how to interpret statistical summaries appearing in journals newspaper reports internet television etc. To learn about the concepts of probability and probabilistic reasoning. To understand variability and analyze sampling distribution. To learn how to interpret and analyze data arising in your own work course work or research . 1.3. The Science of Statistics I hope to persuade you that statistics is a meaningful and useful science whose broad scope of applications to business government and the physical and social sciences are almost limitless. We also want to show that statistics can lie only when they are misapplied. Definition 1.1. Statistics is the science of data. This involves collecting classifying summarizing organizing analyzing and interpreting numerical information. Professional statisticians are .