# Statistics

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## Statistics

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1. Statistics Research in Ecology Maya Damski

2. Atlantic Sharp-nose sharks

3. Sea Turtles

4. Bottle Cap Colors on the Beach Bottle caps are not only the garbage that is washed up on beaches. Some examples include plastic bags and lumber. The litter affects animals, and sometimes kills them.

5. Frequency Distribution of Sea Cigars by Size (cm)

6. Probability

7. Variance Variance is one of the two ways to describe how far away your data is from the mean. This formula is the way to calculate variance. the sum = the mean of the data X = each data value n = the number of values

8. Standard Deviation Standard Deviation also shows how spread out the data are.

9. Theoretical Distribution Curve Theoretical Distribution Curve (TDC) is an ideal picture of a distribution based upon random sampling.

10. T-Test The t-test equation tests if there is a significant difference between the means of two independent samples. The t-test is calculated by the t- statistic. The formula for the t – statistic is on the bottom of this slide. Key X1=mean of the first group X2=mean of the second group n1=number of _ in the first group n2 =number of _ in the second group p