15.Based on 25 time-ordered observations from a simple regression, we have determined the Durbin-Watson statistic,d= 1.21. At= .05, test to determine if there is any evidence of serial autocorrelation. State your conclusions.

Select one:

a)We need the original data to make a correct statistical decision.

b)No, there is no evidence of serial correlation at 5%.

c)The test is inconclusive at 5% level.

d)Yes, there is statistical evidence of serial correlation in the errors at 5%.