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Math 1530 Exam 1

Why do we use randomization? control lurking variables eliminate bias
What to interpret on a histogram shape symmetry center spread gaps outliers peaks (unimodal, bimodal)
How to interpret a scatterplot direction strength form outliers
right skewed mean:median mean is larger than median
correlation ranges from -1 to 1
left skewed mean:median mean is less than median
correlation values close to 0 represent weak linear relationship
correlation values close to 1 represent strong linear relationship
q1 formula .25(n+1)
q3 formula .75(n+1)
Created by: re12