![Casio Classwiz fx-991EX Statistics | Find Mean, Variance, Standard Deviation & Summary Statistics - YouTube Casio Classwiz fx-991EX Statistics | Find Mean, Variance, Standard Deviation & Summary Statistics - YouTube](https://i.ytimg.com/vi/gSJ4SCFrDlc/maxresdefault.jpg)
Casio Classwiz fx-991EX Statistics | Find Mean, Variance, Standard Deviation & Summary Statistics - YouTube
![Amazon.com : Casio FX-991ES Plus Scientific Calculator Fx 991 Es - New & Sealed ship to world wide : Office Products Amazon.com : Casio FX-991ES Plus Scientific Calculator Fx 991 Es - New & Sealed ship to world wide : Office Products](https://m.media-amazon.com/images/I/41C7PMz+0OL.jpg)
Amazon.com : Casio FX-991ES Plus Scientific Calculator Fx 991 Es - New & Sealed ship to world wide : Office Products
![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 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](https://i.redd.it/csddtepsntw91.jpg)
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
International Chemistry Olympiad - IChO - For the competition purposes, all the competitors will be given a calculator Casio fx-991EX. The manual for the calculator can be downloaded from the following link:
![Casio fx-991EX keeps giving math error for simple calculations like ((1/2)/2) and sin inverse (10) etc. Any idea on how to fix this? Is there a chance that the calculator may be Casio fx-991EX keeps giving math error for simple calculations like ((1/2)/2) and sin inverse (10) etc. Any idea on how to fix this? Is there a chance that the calculator may be](https://preview.redd.it/c3y0lcx0ody81.jpg?width=3000&format=pjpg&auto=webp&s=fbeca87556aad36f1c967016c1ccee9a5c323cf9)