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Symbol: P(A)
Symbol Name: probability function
Meaning / definition: probability of event A
Example: P(A) = 0.5
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Symbol: P(A ⋂ B)
Symbol Name: probability of events intersection
Meaning / definition: probability that of events A and B
Example: P(A⋂B) = 0.5
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Symbol: P(A ⋃ B)
Symbol Name: probability of events union
Meaning / definition: probability that of events A or B
Example: P(A⋃B) = 0.5
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Symbol: P(A │ B)
Symbol Name: conditional probability function
Meaning / definition: probability of event A given event B occured
Example: P(A │ B) = 0.3
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Symbol: f (x)
Symbol Name: probability density function (pdf)
Meaning / definition: P(a ≤ x ≤ b) = ∫ f (x) dx
Example:
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Symbol: F(x)
Symbol Name: cumulative distribution function (cdf)
Meaning / definition: F(x) = P(X≤ x)
Example:
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Symbol: μ
Symbol Name: population mean
Meaning / definition: mean of population values
Example: μ = 10
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Symbol: E(X)
Symbol Name: expectation value
Meaning / definition: expected value of random variable X
Example: E(X) = 10
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Symbol: E(X │ Y)
Symbol Name: conditional expectation
Meaning / definition: expected value of random variable X given Y
Example: E(X │ Y=2) = 5
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Symbol: var(X)
Symbol Name: variance
Meaning / definition: variance of random variable X
Example: var(X) = 4
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Symbol: σ2
Symbol Name: variance
Meaning / definition: variance of population values
Example: σ2 = 4
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Symbol: std(X)
Symbol Name: standard deviation
Meaning / definition: standard deviation of random variable X
Example: std(X) = 2
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Symbol: σX
Symbol Name: standard deviation
Meaning / definition: standard deviation value of random variable X
Example: σX = 2
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Symbol: 
Symbol Name: median
Meaning / definition: middle value of random variable x
Example: 
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Symbol: cov(X,Y)
Symbol Name: covariance
Meaning / definition: covariance of random variables X and Y
Example: cov(X,Y) = 4
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Symbol: corr(X,Y)
Symbol Name: correlation
Meaning / definition: correlation of random variables X and Y
Example: corr(X,Y) = 0.6
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Symbol: ρX,Y
Symbol Name: correlation
Meaning / definition: correlation of random variables X and Y
Example: ρX,Y = 0.6
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Symbol: ∑
Symbol Name: summation
Meaning / definition: summation - sum of all values in range of series
Example: 
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Symbol: ∑∑
Symbol Name: double summation
Meaning / definition: double summation
Example: 
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Symbol: Mo
Symbol Name: mode
Meaning / definition: value that occurs most frequently in population
Example:
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