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Bài viết của Trần Bảo Ngọc

Labor-Leisure Choices

People do not obtain utility just from products they purchase. They also obtain utility from leisure time. Leisure time is time not spent at work. The decision-making process of a utility-maximizing household applies to what quantity of hours to work in much ...

Tác giả: Trần Bảo Ngọc viết 15:58 ngày 25/05/2018 chỉnh sửa

The Regression Equation

Data rarely fit a straight line exactly. Usually, you must be satisfied with rough predictions. Typically, you have a set of data whose scatter plot appears to "fit" a straight line. This is called a Line of Best Fit or Least-Squares Line . ...

Tác giả: Trần Bảo Ngọc viết 15:58 ngày 25/05/2018 chỉnh sửa

Appendix B: Practice Tests (1-4) and Final Exams

1.1: Definitions of Statistics, Probability, and Key Terms Use the following information to answer the next three exercises. A grocery store is interested in how much money, on average, their customers spend each visit in the produce department. Using ...

Tác giả: Trần Bảo Ngọc viết 15:57 ngày 25/05/2018 chỉnh sửa

Introduction to Choice in a World of Scarcity

Choices and Tradeoffs In general, the higher the degree, the higher the salary. So why aren’t more people pursuing higher degrees? The short answer: choices and tradeoffs. (Credit: modification of work by “Jim, the Photographer”/Flickr ...

Tác giả: Trần Bảo Ngọc viết 15:57 ngày 25/05/2018 chỉnh sửa

Quadratic Functions

An array of satellite dishes. (credit: Matthew Colvin de Valle, Flickr) Curved antennas, such as the ones shown in [link], are commonly used to focus microwaves and radio waves to transmit television and telephone signals, as well as satellite and ...

Tác giả: Trần Bảo Ngọc viết 15:57 ngày 25/05/2018 chỉnh sửa

Employment Discrimination

Discrimination involves acting on the belief that members of a certain group are inferior solely because of a factor such as race, gender, or religion. There are many types of discrimination but the focus here will be on discrimination in labor markets, ...

Tác giả: Trần Bảo Ngọc viết 15:57 ngày 25/05/2018 chỉnh sửa

Unions

A labor union is an organization of workers that negotiates with employers over wages and working conditions. A labor union seeks to change the balance of power between employers and workers by requiring employers to deal with workers collectively, rather ...

Tác giả: Trần Bảo Ngọc viết 15:57 ngày 25/05/2018 chỉnh sửa

Scatter Plots

Before we take up the discussion of linear regression and correlation, we need to examine a way to display the relation between two variables x and y . The most common and easiest way is a scatter plot . The following example illustrates a scatter plot. ...

Tác giả: Trần Bảo Ngọc viết 15:56 ngày 25/05/2018 chỉnh sửa

Introduction to the Macroeconomic Perspective

The Great Depression At times, such as when many people are in need of government assistance, it is easy to tell how the economy is doing. This photograph shows people lined up during the Great Depression, waiting for ...

Tác giả: Trần Bảo Ngọc viết 15:56 ngày 25/05/2018 chỉnh sửa

Systems of Linear Equations: Three Variables

(credit: “Elembis,” Wikimedia Commons) John received an inheritance of $12,000 that he divided into three parts and invested in three ways: in a money-market fund paying 3% annual interest; in municipal bonds paying 4% annual interest; and in ...

Tác giả: Trần Bảo Ngọc viết 15:56 ngày 25/05/2018 chỉnh sửa