Manatees 2010 Marine biologists warn that the growing number of powerboats registered in Florida threatens the existence of manatees. The data in the table come from the Florida Fish and Wildlife Conservation Commission (myfwc.com/research/manatee/) and the National Marine Manufacturers Association (www.nmma.org/). a) In this context, which is the explanatory variable? b) Make a scatterplot of these data and describe the association you see. c) Find the correlation between Boat Registrations and Manatee Deaths. d) Interpret the value of R2 . e) Does your analysis prove that powerboats are killing manatees?
Business Statistics Notes Week 1 & 2: August 23, August 30 Quantitative Data: Discrete (e.g. number of children) Continuous (e.g. weight, volume) Qualitative Data: information about qualities; information that can't actually be measured Nominal Data (nomialnames) Lowest form of data (e.g. comparison) Nonnumeric label/code Equality (=) relationship No meaningful data (e.g. What is your gender...male, female / What is your hair color...blonde, brown, black, other ) Ordinal Data (numerical) All characteristics of interval data Data labels with order Equality (=) greater, less than >< No meaningful interval distance (e.g. How do you feel today..1. very happy 2. Unhappy 3. Okay 4. Happy