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Lec 2 (Checking for Randomness (Scatterplot (Positive Direction, Negative…
Lec 2
Checking for Randomness
Key Concept
Scatterplot
Positive Direction
Negative Direction
No Linear Correlation
Strength of Linear Relationship
Scatterplots of Paired Data
Important Definition
A probability sample
A non-probability sample
EPSEM
Complex Sample Designs
How can we use data from PPS
General Rule for weighting
Systematic Samples
Randomness
Facts about Correlation
Checking data for randomness