A Regression Study of the Relation between Rocks and Fish Assemblages

A Regression Study of the Relation between Rocks and Fish Assemblages

The objective of this study is to see if the amount of rock in a given transect is related to the fish that inhabited the area. A regression analysis is conducted to find the relation between the two variables, rocks and fish. Besides finding the model, the analysis includes the confidence interval for the coefficient s, residual plots, predicted intervals of the number of fish for selected values of the amount of the rock, and identifying outliers and influential points by looking at various statistics, such as RESIDUAL, STUDENTIZED RESIDUALS, COVRATIO, and DFFITS.