What levels of evidence are present in relation to research and practice

APA format, include references

– What levels of evidence are present in relation to research and practice, and why it is important regardless of the method you use? (Figure 1.3)

– What factors must be assessed when critically appraising quantitative studies (e.g., validity, reliability, and applicability)? Which is the most important? Why? (Figure 1.4)

resource: http://researchguides.uic.edu/c.php?g=252338&p=3950157