## Saturday, September 10, 2011

### Language R

Interesting web sites/pages related to Language R:

Sentiment Mining Video

Text Mining Infrastructure in R

tm - Text Mining Package

Sentiment Mining Video

Text Mining Infrastructure in R

tm - Text Mining Package

Posted by sasdataguru@gmail.com at
3:31 PM

## Friday, September 9, 2011

### How to Memorize p-value

When it comes to test hypotheses, nothing is more important than p-value. If you have hard time to understand or memorize the use of p-value. Here is a simple way to remember it.

**P-value is the probability that the null hypothesis is true. When this value is too small and below a pre-set threshold, we can confidently reject the null hypothesis.**This threshold is called the significant level. This value is set by the investigator and normally is 0.05 or 0.01.
Posted by sasdataguru@gmail.com at
6:32 PM

## Monday, September 5, 2011

## Sunday, September 4, 2011

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