1. MARE 250 Dr. Jason Turner Introduction to Statistics

2. Statistics 101 (really 250) calculation of trends quantitative observations

3. Statistics 101 (really 250) analysis and interpretation of data not only data analysis

4. Statistics 101 (really 250) Initial Observations Explanatory Model Hypothesis Null Hypothesis, Formulated with Experimental Test in Mind Experiment or Field Sampling Test DATA STATISTICS

5. MARE 250 – Stats in Marine Science Will attempt to provide you with an adequate amount of statistical background to:

6. Key Concept of the Day… Introduction to Statistics Define terms relating to data and data collection

7. Types of Biological Data Variable – Different kinds of scientists collect different kinds of data

8. Ratio Scale Data on a Ratio Scale:

9. Ratio Scale There is There exists

10. Interval Scale Data on an Interval Scale: Interval Scales

11. Ordinal Scale Data on an Ordinal Scale: Ordinal Scales –

12. Ordinal Scale Many useful statistical procedures are applicable to ordinal data

13. Nominal Scale Data on a Nominal Scale: Nominal Scale –

14. Types of Biological Data Continuous and Discrete Data Continuous Variable –

15. Types of Biological Data Discrete or Discontinuous (Meristic) Variable –

16. Accuracy and Significant Figures Accuracy – Precision – Accuracy and Precision are NOT synonymous

17. Accuracy and Significant Figures Significant Figures – Therefore, typically report less that the smallest accuracy taken…

18. Accuracy and Significant Figures For example… If you took the measurements: 8.01, 8.0, 8.01554, 8.015546778, 8.0155467782222444555666677788 You would report and average of : more accurately you would report:

19. Frequency Distributions Frequency Table – Fishes collected from a near-shore reef community: SpeciesNumber Observed Raccoon Butterflyfish25 Hawaiian Yellow Tang20 Bluespotted Grouper 5 Moorish Idol15

20. Fishes collected from a near-shore reef community: Species Number Observed Raccoon Butterflyfish25 Hawaiian Yellow Tang20 Bluespotted Grouper 5 Moorish Idol15 Frequency Distributions

21. Frequency Distribution – Number of Individuals 0 10 20 30 Raccoon Butterflyfish Hawaiian Yellow Tang Bluespotted grouper Moorish Idol Bar Graph

22. Frequency Distributions Histogram – Length of Individuals (mm) 30 Number of Individuals 0 10 20 10-1920-2930-3940-49 50-59 60-6970-79

23. Next Time… Chapter 2: Populations and Samples