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Bài viết của Nguyễn Mỹ Hương

Geometric Sequences

Many jobs offer an annual cost-of-living increase to keep salaries consistent with inflation. Suppose, for example, a recent college graduate finds a position as a sales manager earning an annual salary of $26,000. He is promised a 2% cost of living increase ...

Tác giả: Nguyễn Mỹ Hương viết 16:01 ngày 25/05/2018 chỉnh sửa

Measures of the Center of the Data

The "center" of a data set is also a way of describing location. The two most widely used measures of the "center" of the data are the mean (average) and the median . To calculate the mean weight of 50 people, add the 50 weights together and divide by 50. ...

Tác giả: Nguyễn Mỹ Hương viết 16:01 ngày 25/05/2018 chỉnh sửa

The Question of a Balanced Budget

For many decades, going back to the 1930s, proposals have been put forward to require that the U.S. government balance its budget every year. In 1995, a proposed constitutional amendment that would require a balanced budget passed the U.S. House of ...

Tác giả: Nguyễn Mỹ Hương viết 16:00 ngày 25/05/2018 chỉnh sửa

Command-and-Control Regulation

When the United States started passing comprehensive environmental laws in the late 1960s and early 1970s, a typical law specified how much pollution could be emitted out of a smokestack or a drainpipe and imposed penalties if that limit was exceeded. Other ...

Tác giả: Nguyễn Mỹ Hương viết 16:00 ngày 25/05/2018 chỉnh sửa

How Banks Create Money

Banks and money are intertwined. It is not just that most money is in the form of bank accounts. The banking system can literally create money through the process of making loans. Let’s see how. Start with a hypothetical bank called Singleton ...

Tác giả: Nguyễn Mỹ Hương viết 16:00 ngày 25/05/2018 chỉnh sửa

Introduction to Functions

Standard and Poor’s Index with dividends reinvested (credit "bull": modification of work by Prayitno Hadinata; credit "graph": modification of work by MeasuringWorth) Toward the end of the twentieth century, the values of ...

Tác giả: Nguyễn Mỹ Hương viết 16:00 ngày 25/05/2018 chỉnh sửa

Matched or Paired Samples

When using a hypothesis test for matched or paired samples, the following characteristics should be present: Simple random sampling is used. Sample sizes are often small. Two measurements (samples) are drawn from the same pair of individuals or objects. ...

Tác giả: Nguyễn Mỹ Hương viết 16:00 ngày 25/05/2018 chỉnh sửa

Using Fiscal Policy to Fight Recession, Unemployment, and Inflation

We need to emphasize that fiscal policy is the use of government spending and tax policy to alter the economy. Fiscal policy does not include all spending (such as the increase in spending that accompanies a war). Graphically, we see that fiscal policy, ...

Tác giả: Nguyễn Mỹ Hương viết 16:00 ngày 25/05/2018 chỉnh sửa

Exponential and Logarithmic Models

A nuclear research reactor inside the Neely Nuclear Research Center on the Georgia Institute of Technology campu (credit: Georgia Tech Research Institute) We have already explored some basic applications of exponential and logarithmic functions. In this ...

Tác giả: Nguyễn Mỹ Hương viết 16:00 ngày 25/05/2018 chỉnh sửa

Introduction to Linear Functions

A bamboo forest in China (credit: “JFXie”/Flickr) Imagine placing a plant in the ground one day and finding that it has doubled its height just a few days later. Although it may seem incredible, this can happen with certain types of bamboo ...

Tác giả: Nguyễn Mỹ Hương viết 15:59 ngày 25/05/2018 chỉnh sửa