Texas Instruments TI-84 PLUS SILV Guidebook - Page 252
Xmin = 0, Xmax = 30, Ymax = .132, degrees of freedom
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c2pdf(x,df) Note: For this example, Xmin = 0 Xmax = 30 Ymin = L.02 Ymax = .132 c2cdf( c2cdf( computes the c2 (chi-square) distribution probability between lowerbound and upperbound for the specified df (degrees of freedom), which must be an integer > 0. c2cdf(lowerbound,upperbound,df) Fpdf( Üpdf( computes the probability density function (pdf) for the Ü distribution at a specified x value. numerator df (degrees of freedom) and denominator df must be integers > 0. To plot the Ü distribution, paste Üpdf( to the Y= editor. The probability density function (pdf) is: f(x) = n-(--/-n-2---+)---Γ--d--(--)d--/-/-2-2--]--) ⎛ ⎝ n-d ⎞ ⎠ n /2 x n / 2 - 1(1 + nx/d)-(n + d ) /2 ,x ≥ 0 where n = numerator degrees of freedom d = denominator degrees of freedom Chapter 13: Inferential Statistics and Distributions 245