Researchers studied the dexterity of children using a timed test called the Functional Dexterity Test (FDT). Of
Question:
Researchers studied the dexterity of children using a timed test called the Functional Dexterity Test (FDT). Of course, they needed to allow for differences in dexterity between their subjects’ dominant and non-dominant hands. Here is a scatterplot of the speed at which subjects completed the task vs. their age, and lines for dominant and nondominant hands:
Here is a corresponding regression. The variable Dominant is 1 for trials in which a child used his or her dominant hand and 0 for trials with the non-dominant hand. Speed is recorded in tasks/second.
a) What is the proper interpretation of the predictor Dominant in this regression?
b) Are the conditions required for using an indicator variable met for these data?
Step by Step Answer:
Intro Stats
ISBN: 9780134668420
5th Edition
Authors: Richard D De Veaux, Paul F Velleman, David E Bock, Nick Horton