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Bài viết của Lê Thị Khánh Huyền

Bank Regulation

A safe and stable national financial system is a critical concern of the Federal Reserve . The goal is not only to protect individuals’ savings, but to protect the integrity of the financial system itself. This esoteric task is usually behind the scenes, ...

Tác giả: Lê Thị Khánh Huyền viết 15:52 ngày 25/05/2018 chỉnh sửa

Parametric Equations

Consider the path a moon follows as it orbits a planet, which simultaneously rotates around the sun, as seen in [link]. At any moment, the moon is located at a particular spot relative to the planet. But how do we write and solve the equation for the position ...

Tác giả: Lê Thị Khánh Huyền viết 15:52 ngày 25/05/2018 chỉnh sửa

Modeling with Trigonometric Equations

The hands on a clock are periodic: they repeat positions every twelve hours. (credit: “zoutedrop”/Flickr) Suppose we charted the average daily temperatures in New York City over the course of one year. We would expect to find the lowest ...

Tác giả: Lê Thị Khánh Huyền viết 15:52 ngày 25/05/2018 chỉnh sửa

Modeling Using Variation

A used-car company has just offered their best candidate, Nicole, a position in sales. The position offers 16% commission on her sales. Her earnings depend on the amount of her sales. For instance, if she sells a vehicle for $4,600, she will earn $736. She ...

Tác giả: Lê Thị Khánh Huyền viết 15:52 ngày 25/05/2018 chỉnh sửa

The Central Limit Theorem for Sums

Suppose X is a random variable with a distribution that may be known or unknown (it can be any distribution) and suppose: μ X = the mean of Χ σ Χ = the standard deviation of X If you draw random samples of size n , ...

Tác giả: Lê Thị Khánh Huyền viết 15:51 ngày 25/05/2018 chỉnh sửa

Testing the Significance of the Correlation Coefficient

The correlation coefficient, r , tells us about the strength and direction of the linear relationship between x and y . However, the reliability of the linear model also depends on how many observed data points are in the sample. We need to look at both the ...

Tác giả: Lê Thị Khánh Huyền viết 15:51 ngày 25/05/2018 chỉnh sửa

Taxation

There are two main categories of taxes: those collected by the federal government and those collected by state and local governments. What percentage is collected and what that revenue is used for varies greatly. The following sections will briefly explain ...

Tác giả: Lê Thị Khánh Huyền viết 15:51 ngày 25/05/2018 chỉnh sửa

Exponential and Logarithmic Equations

Wild rabbits in Australia. The rabbit population grew so quickly in Australia that the event became known as the “rabbit plague.” (credit: Richard Taylor, Flickr) In 1859, an Australian landowner named Thomas Austin released 24 rabbits into the ...

Tác giả: Lê Thị Khánh Huyền viết 15:51 ngày 25/05/2018 chỉnh sửa

Introduction to Poverty and Economic Inequality

Occupying Wall Street On September 17, 2011, Occupy Wall Street began in New York City’s Wall Street financial district. (Credit: modification of work by David Shankbone/Flickr Creative Commons) Occupy Wall Street In September 2011, a group of ...

Tác giả: Lê Thị Khánh Huyền viết 15:51 ngày 25/05/2018 chỉnh sửa

Aggregate Demand in Keynesian Analysis

The Keynesian perspective focuses on aggregate demand. The idea is simple: firms produce output only if they expect it to sell. Thus, while the availability of the factors of production determines a nation’s potential GDP , the amount of goods and ...

Tác giả: Lê Thị Khánh Huyền viết 15:50 ngày 25/05/2018 chỉnh sửa