### Supply

Tuesday March 20th, 2012

Supply, in economics, is the quantity of goods and/or service produced and offered in the market at a certain price in a certain period of time.

### Curva de Oferta

Tuesday March 20th, 2012

Curva de oferta é a relação entre o preço de um bem e a quantidade desse bem que os produtores estão dispostos a produzir e […]

### Demand

Tuesday March 20th, 2012

In economics, demand, is the quantity of goods and/or services the buyers wish to purchase at a certain price in a given market during a defined time.

### Correlação

Sunday March 18th, 2012

Correlação, também chamada de coeficiente de correlação, indica a força e a direção do relacionamento linear entre duas variáveis aleatórias. No uso estatístico geral, correlação […]

### Covariance

Wednesday March 14th, 2012

The covariance between two real random variables X and Y, is defined as the measure of how these two variables vary together. The covariance is […]

### Expected Value

Wednesday March 14th, 2012

The expected value of a discrete random variable is the probability-weighted average of all possible values. In other words, each possible value the random variable can assume […]

### Variance

Wednesday March 7th, 2012

The variance measures how far a set of numbers is spread out. The variance of a data set is the squared sum of the distance between each number and […]

### Geometric Mean

Monday March 5th, 2012

The geometric mean of a set of positive numbers is defined by the “nth root” of the “n”numbers multiplication.     The geometric mean is widely used in financial […]

### Harmonic Mean

Monday March 5th, 2012

The harmonic mean of real positive numbers x1,…,xn is definided as the number of numbers divided by the sum of the inverse of each number, […]

### Measures of Central Tendency

Sunday March 4th, 2012

Measures of Central Tendency shows  the value around the observations are grouped. The most common measures of central tendency are the mean (aritmetic/harmonic/geometric), the median and […]