> > U n a n s w e r e CI 0 u e s t I o n s 16. Also of interest is whether there are any differences in the waiting time distributions by self reported race of the survey participants. Participants classified themselves into 1 of 3 racial categories: while. black, other (did not identify as either black or white). Following are the results from a simple regression performed to relate waiting time to race: 9 =51.5 +19.3x1+ 2.6X2 where x1=1 if the respondent identifies as black (and 0 if not), and x2=1 if the participant identifies as other (0 if not). The standard error of the slope for x1 is 1.2, and for x2 is 2.5. The R2 is 0.01. -What is the interpretation of the R2 value? |:| a. 99% of the variation in waiting times is explained by race. D b. 1% of the variation in waiting times is explained by race. |:| c. The association between waiting times and race is statistically signicant. (alpha: 0.05) d. The association between waiting times and race is not statistically significant. (alpha : 0.05) 1 point