Read the following excerpts of a study by Ferrari and Taylor (2019): The purpose of this quality improvement (Q1) project was to determine whether the development of evidence-based standardized clinical procedures influenced by the combination of lean methodology and shared governance aids in the reduction of central line associated bloodstream infection (CLABSI). The specific aim was to align with organizational strategic goals for hospital-acquired condition reductions. The CLABSI rate baseline data were from February 2017 to December 2017 (11 months), and the postdata were from January 2018 to November 2018 (11 months). The pre-/postdata were analyzed using an independent t test, effect size, and control chart for mean score and standard deviation. The cost avoidance was evaluated by calculating CLABSI numbers pre- and postimplementation of evidence-based recommendations. Choose the most likely options for the information missing from the statements below by selecting from the lists of options provided. O Differences between groups Alpha Level of significance O Relationships between groups