Assume you have been asked to speak to a group of beginning doctoral students who have just started an introductory research methods course. Based on the assigned readings and additional research, create a multimedia PowerPoint presentation to address the following information:

• Discuss the distinction between random selection and random assignment.  Determine how random selection and random assignment would contribute to the reduction of uncertainty. Provide examples to illustrate your findings.
• Explain how random selection and assignment might help to reduce experimental error and mitigate threats to validity. 
• Select at three sampling methods to critique, then discuss the procedure and benefits of each.

Incorporate appropriate animations, transitions, and graphics as well as speaker notes for each slide. The speaker notes may be comprised of brief paragraphs or bulleted lists.

Support your presentation with at least five scholarly resources. In addition to these specified resources, other appropriate scholarly resources may be included. 

Length: 12-15 slides (with a separate reference slide)
Notes Length: 200-350 words for each slide