Hil is significantly less than zero D Question 35 10 pts The Six Sigma Black Belt team has been charged with reducing order fulfillment cycle time from an average of 65 days down to 3 days. Recommendations were made subsequent to the completion of the DMAIC - Define, Measure, Analyze, Improve, and Control phases. Independent random samples of 20 order fulfillment times were taken before the implementation of the recommendations and 18 were taken after implementation. To test for the impact on mean cycle time, which of the following statistical tests would you recommend? O 7-test for differences in means O t-test for differences in means O F-test for significance of explanatory power O Z-test for differences in proportions O t-test for strength of the linear association 1 Proctorio is sharing your screen. Stop sharing e