The following MINITAB output displays the cumulative distribution function curves of three normal distributions. Their mean and variance, respectively, are (0, .5), (0, 1), and (0, 2). Please compare the three cumulative distribution curves indicated in the figure.

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MTB > SET C1 DATA> -5;5/0.1 DATA> END MTB > CDF C1 C2 ; SUBC> NORMAL 0 0 .5. MTB > CDF C1 C3 ; SUBC> NORMAL 0 1. MTB > CDF C1 C4; SUBC> NORMAL 0 2. MTB > GPRO * NOTE * Professional Graphics are enabled. Standard Graphics are disabled. Use the GSTD command to enable Standard Graphics. MTB > Plot C2 *C1 C3 *C1 C4 *C1; SUBC> Connect, SUBC> Type 1; SUBC> Color 1; SUBC> Size 1; SUBC> Overlay; SUBC> Axis 1; SUBC> Label "X"; SUBC> Axis 2; SUBC> Label "fx) ".