Color words (3.1, 3.2, 12.1) Can we use a student’s word task time to predict his or her color task time?

(a) Make an appropriate scatterplot to help answer this question. Describe what you see.

(b) Use your calculator to find the equation of the leastsquares regression line. Define any symbols you use.

(c) Find and interpret the residual for the student who completed the word task in 9 seconds.

(d) Assume that the conditions for performing inference about the slope of the true regression line are met.

The P-value for a test of H0 : b = 0 versus Ha : b > 0 is 0.0215. Explain what this value means in context.