Χ 2cdf(left bound, right bound, df) corresponds to P(left bound Χ 2.Χ 2pdf( x, df) yields the probability density function value, only useful to plot the chi 2 curve, in which case " x" is the variable.tcdf(left bound, right bound, df) corresponds to P(left bound t.tpdf( x, df) yields the probability density function value, only useful to plot the student- t curve, in which case " x" is the variable).invNorm( p) yields the critical value, k: P( Z k) = p for the standard normal.invNorm( p, μ, σ) yields the critical value, k: P( X k) = p.normalcdf(left bound, right bound) corresponds to P(left bound Z. ![]()
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