• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Number of Powerboats Registered vs. Number of Manatees Killed from 1977 to 1990

Extracts from this document...

Introduction

Number of Powerboats Registered vs. Number of Manatees Killed from 1977 to 1990 Year Number of Powerboats Registered (thousands) Number of Manatees Killed 1977 447 13 1978 460 21 1979 481 50 1980 498 16 1981 513 24 1982 513 20 1983 526 25 1984 559 34 1985 585 35 1986 614 33 1987 645 69 1988 675 43 1989 711 50 1990 719 55 Data table delineating records of Manatee deaths to Powerboat registrations which over the course of time portrays an increase of the number of deaths to registrations. The data seems to stay consisted over the years, which is better delineated by the scatter plot below. ...read more.

Middle

My R value is .969 which is significantly greater than .532 which comes from the degrees of freedom chart suggesting correlation and accuracy. The statistical evidence from the data table and the comparative scatter plot indicates that the death toll is correlated with the number of registered powerboats and will increase over the given number of years to come. Qualitative Observations * The trend line represents a gradual increase over the course of 23 years. * The number of Manatees killed drastically increases from 13 in 1977 to 55 in 1990 which indicates a continuing increase in deaths if it remains on this course. ...read more.

Conclusion

As the rate gradually increases already, supported by the scatter plot, there will soon be fewer manatees as a result of this problem. Other studies have been conducted to support these claims. "There have been at least 60 manatee deaths from watercraft collisions this year" (Collier 2009). This report comes from a study conducted every year by this society to monitor manatee deaths. Another finding made by Dr. Bruce Ackerman suggests that watercrafts are the single most lethal weapon against manatees. "The single greatest identifiable cause of death was collisions with watercraft."(Dr. Bruce Ackerman 2008). His findings indicate that at the rate of manatee deaths due to watercrafts the population will slowly diminish. ?? ?? ?? ?? 1 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Biology essays

  1. Biology Extended Essay 2009

    process.23 Table 224: Vitamin Content of selected fresh orange juice before and after thermal processing Vitamins Unit/100mL Fresh orange juice Pasteurized orange juice Ascorbic acid mg 35-56 34-52 Thiamin ug 60-145 30-100 Riboflavin ug 11-90 10-40 Niacin ug 200-300 170-300 B-6 ug 25-80 16-31 Folacin ug 120-330 150-320 Pantothenic acid

  2. Bipedalism vs. Quadrapedalism

    Dependent: The amount of time it takes to reach the top of the steps. Control: The length and gender of the person in the experiment. Material Four people Four stop watches Four hard cover books Data sheet Procedure 1. Hold both stop watches in hand and line two people at the bottom of 26 steps.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work