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Wysłany: Pon 13:25, 14 Paź 2013
Temat postu: moncler Conditional probability, statistics and th
Friends, today we are going to learn the basic concepts behind conditional probability and how it will help in statistical calculations. Friends, today we are going to learn the basic concepts behind conditional probability and how it will help in statistical calculations. For understanding conditional probability, we need to know what probability is. So, in simple if we say an event is probable it means that it may happen and it may not happen, so probability is a way of telling or expressing a knowledge that an event will occur or has occurred. Probability theory plays an important role in various human activities that involves the analysis of a large set of data.
So, conditional probability is the probability of an event occurring given that another event has already occurred. The Mathematical view of this statement [url=http://www.mnfruit.com/doudounemoncler.php]moncler[/url] comes with the following equation that an event X occurs, given that an event T has already occurred.
P (T|X) = P(X and T) / P(X)
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Besides this there is another method to calculate conditional probability known as Baye's formula. It states that the probability of event T is the sum of the conditional [url=http://www.jeremyparendt.com/Barbour-Paris.php]barbour pas cher soldes[/url] probabilities of event T given that event X has or has not occurred. Mathematical expression for the above is : P(T) = P(T|X)P(X) + P(T|Xc)P(Xc)
And for the two independent events (for event X and event T) the expression is:
P(T)P(X) + P(T)P(Xc) = P(T)(P(X) + P(Xc)) = P(T)(1) = P(T)
Let us take an example to understand the basic behind the conditional probability problems: calculate the probability of getting a head when we toss a coin.
So, we all know coin has two faces either head or tail. So when toss happen only one side of coin is visual. So the probability of getting a head is:
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Statistics is the science which deals with variations, randomness and chance. It is different from other science as others works or studied on exact deterministic mathematics values. In a [url=http://www.moncleroutletosterblade.com]moncler outlet[/url] lot of statistical analysis and experiments, the result depends on probability distributions as probability plays an important part in statistical analysis, statistical analysis uses probabilities and probability calculations uses statistical analysis.
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