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Important! Mean: The average of a set of numbers. The females’ average size is larger than the males in this sample.

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Presentation on theme: "Important! Mean: The average of a set of numbers. The females’ average size is larger than the males in this sample."— Presentation transcript:

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2 Important! Mean: The average of a set of numbers. The females’ average size is larger than the males in this sample.

3 Important! Don’t litter at the beach so turtle hatchlings don’t die!

4 Important! Percentage: A part per 100. The percentages in the pie graph show the percentages of bottle cap colors.

5 Size Intervals (cm)Number of Sea Cigars "1—5"0 "6—10"2 "11—15"4 "16—20"10 "21—25"7 "26—30"2

6 Time Water Temperature Substrate/ Depth Wave ActionSurvived 1223No 2146 3611 4543 5236Yes 6432No 7164 8224Yes 9222No 10513No 11156No 12511No 13534Yes 14466No 15313No 16466No 17425Yes 18536Yes Important! Probability: The chance that something will happen. The factor that affected coral survival the most was wave action. Theoretical ProbabilityObserved Probabiltiy 0.220.27

7 Lengths 6.7 7.3 7.5 9.4 9.8 11.2 12.5 13.1 17 Variance 10.7756or 10.8 σ 2 = ∑(X – X) 2 n - 1 Variance is the difference between a number and the mean of the number set the number is part of. The formula for variance is: Below is an example of variance.

8 Lengths 6.7 7.3 7.5 9.4 9.8 11.2 12.5 13.1 17 Standard Deviation3.28261or 3.3 Standard Deviation is a measure of dispersion in a frequency distribution. The formula for variance is: Below is an example of variance. σ 2 = ∑(X – X) 2 n - 1

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