Casio FX-991ZA Plus II Advanced Scientific Calculator | Shop Today. Get it Tomorrow! | takealot.com
Casio fx-CG50 Graphing calculator Black Display (digits): 21 battery-powered (W x H x D) 89 x 18.6 x 188.5 mm | Conrad.com
Trying to calculate the first and third quartile with my casio fx-991EX but I'm not getting accurate results, any help? The correct quartiles are: Q1= 2.75 , Q3= 7.25 : r/calculators