GCE 2020 statistics exam question part 2

[collettechimoka]

I'm a little bit behind where you didn't devide by f in Standard deviation but while in the formula it appears that f needs to devide into fx-(x)^2.Instaed you went ahead finding a square root and done

[AstridNPhiri]

Sir am left behind there on adding ^2.
When i do that on my calculations it's not bringing

[GiftChimanga-gzmd]

Thank you very much sir this helps me a lot

[LorrisaLungu]

Is it true that the numbers are not suppose to be in decimals but rather converted🤷

[LindaMoono-uobf]

Sir, why didn't you write but instead you wrote does that seven come from?

[felistusmbewe]

Sir, is it possible that two people who are writing the exam and they are in different class rooms, is it possible that they can make the Same mistake when adding numbers when finding the mean? eg I find maybe 50.46 also she finds the same how is it possible?

[febbychiti]

Sir My calculator gives me 1041.25_ )2 then after square root my answer is 918.4260386 correct me where I missed up

[getthochemicaljwise]

Sir it's gives 915 then divide by 30 = 30.5 not the way are answering u are confusing us

[musichits]

Sir your calculations are totally different from the way I was calculating e.g when you divide 925 by 30 it's giving me including on the square root