MATH201_Worksheet1-1 (1)

MATH 201 Statistics for Environmental Professionals ● Worksheet 1 Name Section 1. Suppose that you are a wildlife biologist working in a National Park. One of your tasks is to conduct demographic surveys of American alligators in the park. You have conducted a nightlight survey and measured encountered alligators. The survey data are shown in the below table. Answer the following questions using this dataset. Animal ID Habitat type Water temperature (°C) Head Length (cm) Total Length (cm) Weight (kg) Sex Number of deformities 1 Marsh 20 21.2 144.5 9 Female 0 2 Marsh 19 25.6 185.2 16 Male 0 3 Marsh 20 20.4 139.9 8 Female 0 4 Marsh 19 26.8 203.3 19 Female 1 5 Marsh 20 30.0 211.5 17 Male 0 6 Marsh 22 30.0 224.5 28 Female 1 7 Marsh 20 29.5 212.8 17 Male 0 8 Marsh 20 26.9 195.8 19 Male 0 9 River 23 25.7 186.9 19 Male 0 10 River 23 32.9 247.7 39 Male 0 11 River 23 29.6 210 27 Female 0 12 River 25 24.3 178.5 15 Male 2 Question 1. How many variables are in the data set? Refer to the textbook 1.1. (5 pts.) There are 7 variables in this data set. Habitat type, Water Temperature, Head Length, Total Length, Weight, Sex, and Number of deformities. Question 2. List all numerical (quantitative) variables and classify them into continuous or discrete. Refer to your textbook 1.1 & 1.2. (5 pts.) Water Temperature- Continuous Head Length- Continuous Total Length- Continuous Weight- Continuous Number of Deformities- Discrete Question 3. Find the median weight of the female alligators. Show your work. Refer to the textbook 2.3. (10 pts.) The median weight of the female alligators is 19. 8 9 19 27 28 Question 4. Calculate the mean weight of the female alligators.. Show your work. Refer to the textbook 2.5. (10 pts.) The mean weight of the female alligators is 18.2 lbs. 8+9+19+27+28=91/5=18.2