added Assignment IV

Assignment IV/presentation.md

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+6. Oral Presentation (5%). Plan for a ~5 minute presentation; slides must cover the 
+following: 
+a). Title (with your name) 
+b). Problem area – what you wanted to explore/ solve/ predict and why, and what you 
+wanted to predict? 
+c). The data – where it came from, why it was applicable and the preliminary assessments 
+you made. 
+d). How you conducted your analysis: distribution, pattern/ relationship and model 
+construction. What techniques did you use/ not use and why? What worked? What did not 
+work? How did you apply the model? How did you optimize, account for uncertainties? 
+f). What did you predict and what decisions (prescriptions) were possible. What was the 
+outcome, conclusions?