I've stumbled upon a strange error while attempting to calculate variance using the windows calculator for homework.
I don't think this is about order of operations like a lot of older posts talk about, this genuinely just looks like the calculator is somehow making a mistake. I've tried changing where I place the brackets, doing the equation step by step instead of all at once etc, but it just seems to come up with the wrong answer. It's also strangely close to the correct answer, so I know it's not an input issue as it would be wildly different.
I tested it against my phone calculator, google's calculator, and my physical calculator. All of them - and the answer to my homework - disagree with windows, so I refuse to believe it's correct.
I don't think the image attachment is working for this post, so I'll attach an external gallery with 6 images: https://postimg.cc/gallery/j5WwjBr
My calculator app is version 11.2041.0.0
My windows version is Windows 10 Home, 22H2, OS build 19045.4291
Any explanation or help would be greatly appreciated!