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# Computers and Statistics Jack Lawhorn RiE Summer 2009 - PowerPoint PPT Presentation

Computers and Statistics Jack Lawhorn RiE Summer 2009. Average Length of Sharpnose Sharks. Sharpnose Shark. Average Length. Male. Female. Gender. Chi² Test. The Chi Square test is used to see if there are any significant differences between groups of data samples.

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## PowerPoint Slideshow about ' Computers and Statistics Jack Lawhorn RiE Summer 2009' - mariko-burke

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Computers and StatisticsJack Lawhorn RiE Summer 2009

### Average Length of Sharpnose Sharks

SharpnoseShark

Average Length

Male

Female

Gender

The Chi Square test is used to see if there are any significant differences between groups of data samples.

Probability= the chance of an event occuring.

4 out of my __ coral polyps survived.

Standard Deviation &Variance

Variance= how close together a group of data is from the mean.

Standard Deviation= the square root of the variance.

Chi-square Value: 3.24 compared w/ 3.84 from Chi-square table at 1 DF.

Above: S= Survived///D= Died

Bellow: Overall Survival Rate 59.4%  There was no significant difference but it was so close that it would be worth it to do the same experiment with hundreds or even thousands of samples.

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