INFERETIAL STATS FORMULAS Flashcards

1
Q

Standard Score/ Standard Normal Dist.

A

z= value - mean/ standard deviation

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2
Q

Formula for the minimum sample size needed for an interval estimate of population mean

A

n= ((za/2 • ó)/E)^2

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3
Q

Z-test

A

z= sample mean - hypothesized population mean/ (population standard deviation/ square root of sample size)

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4
Q

T test for a mean

A

t= Sample Mean-hypothesized population mean/ (sample standard deviation/ square root of n

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