Summary Statistics Flashcards by Joshua Oakley

Q

How to calculate sample/population mean

A

sum of all x values/n

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Q

How to calculate median position in a list

A

N+1/2

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Q

How to calculate geometric mean

A

the nth root of the product of n numbers

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Q

How to calculate geometric rate of return

A

geometric mean-1

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Q

What is interquartile range

A

The difference between q3-q1

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Q

How to calculate Sample/population variance

A

Sample= sum of( x-xbar)^2/N-1
sum of (x-mu)^2/N

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Q

How to calculate Standard Deviation

A

Square root of variance

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Q

Key difference between sample mean and population mean

A

Denominator is N-1

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Q

How to calculate Sample covariance

A

Sum (x-xbar)(y-ybar)/ n-1

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Q

How to calculate Sample correlation coefficient

A

Covariance (Sxy)/ Sx x Sy

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