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10 questions from this quiz
fr=fnf_r = \frac{f}{n}fr=nf
Experimental probabilities
Var(X)=E(X2)−μ2\text{Var}(X) = E(X^2) - \mu^2Var(X)=E(X2)−μ2
P(X≤x)P(X \leq x)P(X≤x)
They increase from 0 to 1
1
Ten
0.68
π4\frac{\pi}{4}4π
xˉ=∑x⋅fr\bar{x} = \sum x \cdot f_rxˉ=∑x⋅fr
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