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Statistics and Computers

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Presentation on theme: "Statistics and Computers"— Presentation transcript:

1 Statistics and Computers
By: Julian James

2 Atlantic Shark Graph

3 Sea Turtle Survival Graph

4 Chances of success for a Coral Planula
6 out of 18 coral planulas Survived because there was not enough heat for the corals Date 6/23/09 Time: 10:30

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6 Variation Variance (s2) is two values that are used in statistics to describe how far away your data are from the mean is variance and standard deviation. Set 1: 8,9,10,11, set 1 isnt far from the mean Set 2: 1,2,10,17, set 2 is far from mean

7 Standard Deviation Describes how spread out the data are.
The sq. root of variance. Sq.root of 10.8 = 3.3=σ

8 Theoretical Distribution

9 Chi-square The chi-square test can be used to see if there are any significant differences between data sites or sources. Chi-Square formula:χ2= ∑(observed-predicted)2 Predicted

10 The t-test The t-test equation can be used to calculate the t-statistic is one designed to test whether there is a significant difference between the means of two independent samples.

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