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Bài viết của Nguyễn Mỹ Hương

Definitions of Statistics, Probability, and Key Terms

The science of statistics deals with the collection, analysis, interpretation, and presentation of data . We see and use data in our everyday lives. Collaborative Exercise In your classroom, try this exercise. Have class members write down the ...

Tác giả: Nguyễn Mỹ Hương viết 16:03 ngày 25/05/2018 chỉnh sửa

Public Goods

Even though new technology creates positive externalities so that perhaps one-third or one-half of the social benefit of new inventions spills over to others, the inventor still receives some private return. What about a situation where the positive ...

Tác giả: Nguyễn Mỹ Hương viết 16:03 ngày 25/05/2018 chỉnh sửa

The Keynesian Perspective on Market Forces

Ever since the birth of Keynesian economics in the 1930s, controversy has simmered over the extent to which government should play an active role in managing the economy. In the aftermath of the human devastation and misery of the Great Depression, many ...

Tác giả: Nguyễn Mỹ Hương viết 16:03 ngày 25/05/2018 chỉnh sửa

Tracking Inflation

Dinner table conversations where you might have heard about inflation usually entail reminiscing about when “everything seemed to cost so much less. You used to be able to buy three gallons of gasoline for a dollar and then go see an afternoon movie for ...

Tác giả: Nguyễn Mỹ Hương viết 16:03 ngày 25/05/2018 chỉnh sửa

How Changes in Income and Prices Affect Consumption Choices

Just as utility and marginal utility can be used to discuss making consumer choices along a budget constraint, these ideas can also be used to think about how consumer choices change when the budget constraint shifts in response to changes in income or price. ...

Tác giả: Nguyễn Mỹ Hương viết 16:03 ngày 25/05/2018 chỉnh sửa

Introduction to Monopolistic Competition and Oligopoly

Competing Brands? The laundry detergent market is one that is characterized neither as perfect competition nor monopoly. (Credit: modification of work by Pixel Drip/Flickr Creative Commons) The Temptation to Defy the Law Laundry detergent and bags of ...

Tác giả: Nguyễn Mỹ Hương viết 16:02 ngày 25/05/2018 chỉnh sửa

Defining Money by Its Functions

Money for the sake of money is not an end in itself. You cannot eat dollar bills or wear your bank account. Ultimately, the usefulness of money rests in exchanging it for goods or services. As the American writer and humorist Ambrose Bierce (1842–1914) wrote in ...

Tác giả: Nguyễn Mỹ Hương viết 16:02 ngày 25/05/2018 chỉnh sửa

Using the Central Limit Theorem

It is important for you to understand when to use the central limit theorem . If you are being asked to find the probability of the mean, use the clt for the mean. If you are being asked to find the probability of a sum or total, use the clt for sums. This ...

Tác giả: Nguyễn Mỹ Hương viết 16:02 ngày 25/05/2018 chỉnh sửa

Systems of Nonlinear Equations and Inequalities: Two Variables

Halley’s Comet ([link]) orbits the sun about once every 75 years. Its path can be considered to be a very elongated ellipse. Other comets follow similar paths in space. These orbital paths can be studied using systems of equations. These systems, however, ...

Tác giả: Nguyễn Mỹ Hương viết 16:02 ngày 25/05/2018 chỉnh sửa

Polar Coordinates: Graphs

The planets move through space in elliptical, periodic orbits about the sun, as shown in [link]. They are in constant motion, so fixing an exact position of any planet is valid only for a moment. In other words, we can fix only a planet’s instantaneous ...

Tác giả: Nguyễn Mỹ Hương viết 16:02 ngày 25/05/2018 chỉnh sửa