# What formulae do I need to learn for Edexcel S1?

#1
I already know a few, for example one for normal distribution and a few for Venn Diagrams, however I don't want to miss one out. Thanks.
0
5 years ago
#2
(Original post by AxSirlotl)
I already know a few, for example one for normal distribution and a few for Venn Diagrams, however I don't want to miss one out. Thanks.
The end of chapter summaries in the official text book are worth looking at
From memory you'll need
A formula or method to estimate median, quartiles, etc from grouped continuous data
Frequency density = F/CW for histograms
Formula for variance and standard deviation
Probability Formulae for showing events are independent
Be able to rearrange the one in the formula book to derive one for conditional probability
Formula for calculating skewness (usually given) and other ways to identify skew
E(X) and Var(X) for discrete random variable
E(aX+b) and Var(aX+b)
It's worth noting E(X) and var(X) for discrete uniform distribution, though it's rarely tested

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0
5 years ago
#3
(Original post by AxSirlotl)
I already know a few, for example one for normal distribution and a few for Venn Diagrams, however I don't want to miss one out. Thanks.
Check the spec it's all there g
1
5 years ago
#4
SD(X) for discrete random variables also gets affected by coding by
for histograms
0
X

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