Critical Appraisal of a Quantitative Study

The article "Evidence-Based Practice Step by Step: Critical Appraisal of the Evidence: Part I" provides a critical appraisal guide for appraising quantitative studies. Select one quantitative study from the research articles you have identified for your project.
The capsont project subject is....
In Texas, how can nurses raise workplace violence penalties to a felony of the third degree through legislation for all healthcare personnel, compared to the current Class A misdemeanor penalties for healthcare personnel outside of an emergent situation in order to create a healthy zero tolerance workplace environment to improve nursing satisfaction; thus decreasing nursing shortages and improving patient outcomes within the next five years?
Also see the attached documents for the selected project. 
Using the quantitative study you have selected, answer three of the questions listed in the critical appraisal guide in the above article.
Why was the study done? 
What is the sample size? 
Are the instruments of the major variables valid and reliable? or How useful it is to practice?