Midterm 2 Formulas Flashcards by Day Copland

Q

Formula for variance

A

V= sum(x-mean)^2/sample

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Q

Formula of standard deviation

A

SD=√sum(x-mean)^2/sample

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Q

Formula of mean

A

m = sum/number

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Q

Formulas for z scores

A

z= x-mean/sd

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Q

Formula for Interquartile range

A

IQR = (Q3) - (Q1)

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Q

Formula for margin of error using z

A

MOE= Z x SD/√sample

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Q

Formula for standard error

A

SE=SD/√sample

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