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Mean ∑x÷f or ∑fx÷∑f
Median n÷2 then interpolate
Interpolation LB +{[(n÷2-F)÷FC]×C}
Coding y=x-a/b
Standard Deviation √(∑x²/n)-(∑x/n)²
Histograms Frequency= Class Width x Frequency Density
Skew 3((mean-median)/standard deviation)
Positive Skew Q2- Q1< Q3-Q2 Mode< Median<Mean
Negative Skew Q2- Q1> Q3-Q2 Mean<Median<Mode
E∪F Everything in E, F or both
E∩F Outcomes in E and F
E' Outcomes not in E
P(A∪B) = P(A) + P(B) - P(A∩B)
P(A|B) P(A∩B)/P(B)
Mutually Exclusive: P(A∪B) = P(A) + P(B)
Mutually Exclusive: P(A|B) = 0
Independent Events: P(A∩B)= P(A) X P(B)
Independent Events: P(A|B) = P(A)
Created by: laurens2411