Texas Instruments TI-84 PLUS SILV Guidebook - Page 256
ShadeNorm, Shade_t, DISTR DRAW, Xmin = 55, Xmax = 72
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Note: Before you execute a DISTR DRAW instruction, you must set the window variables so that the desired distribution fits the screen. DISTR DRAW 1: ShadeNorm( 2: Shade_t( 3: Shadec2( 4: ShadeÜ( Shades normal distribution. Shades Student-t distribution. Shades c2 distribution. Shades Üdistribution. Note: L1â99 and 1â99 specify infinity. If you want to view the area left of upperbound, for example, specify lowerbound=L1â99. ShadeNorm( ShadeNorm( draws the normal density function specified by mean m and standard deviation s and shades the area between lowerbound and upperbound. The defaults are m=0 and s=1. ShadeNorm(lowerbound,upperbound[,m,s]) Classic Note: For this example, Xmin = 55 Xmax = 72 Ymin = L.05 Ymax = .2 Shade_t( Shade_t( draws the density function for the Student-t distribution specified by df (degrees of freedom) and shades the area between lowerbound and upperbound. Shade_t(lowerbound,upperbound,df) Classic Note: For this example, Xmin = L3 Xmax = 3 Ymin = L.15 Ymax = .5 Chapter 13: Inferential Statistics and Distributions 249