Lecture - August 28th 

0:28 - Section 1.2: Observational Studies Versus Designed Experiments
0:56 - Section 1.2.1: Distinguish between an observational study and an experiment
27:21 - Section 1.2.2: Explain the various types of observational studies
32:46 - Section 1.3: Simple Random Sampling
44:28 - Section 1.4: Other Effective Sampling Methods
45:29 - Section 1.4.1: Obtain a Stratified Sample
52:04 - Section 1.4.2: Obtain a Systematic Sample
58:06 - Section 1.4.3: Obtain a Cluster Sample
1:09:34 - Note #1: Pervasiveness of Randomness
1:10:19 - Note #2: Different Kinds of Rounding