For each of the following studies, select the appropriate method of analyzing the data. A scientist is hoping to compare the mean levels of DDT toxin found in three species of fish in a local river. He randomly samples 50 of each species to use in the analysis. For each fish, he measures the amount of DDT toxin present. Ideally he will be able to rank the species based on the mean level of toxin found in each of the three species.
A. A confidence interval for the mean level of toxins in each fish species.
B. An analysis of variance (ANOVA) of a single factor at 3 levels, followed by a Bonferroni analysis of the treatment means, if necessary.
C. A simple linear regression analysis to predict toxin amount.
D. A t-test comparing the population mean toxin levels of the three species.