things i personally need to remember Flashcards by Ellie Paddison | Brainscape

Q

rearranged cosine

A

CosA= b^2+c^2 - a^2 / 2 x b x c

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Q

stratified sampling

A

(no. in category / total) x sample size

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Q

population density

A

population density = no. people / land area

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Q

sample size

A

new/old

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