stats 3-3 3-4 Flashcards by Jace ochsenhirt | Brainscape

Q

STATS 3-3 3-4

coefficient of variation

A

(Sx/xbar) * 100

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Q

STATS 3-3 3-4

standard bell curve deviations

A

68% within 1st deviation
95% within 2nd deviation

99.7% within 3rd standard deviation

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Q

STATS 3-3 3-4

Variance of Sx

A

(Sx)2

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Q

STATS 3-3 3-4

z-score

A

the number of standard deviations a score is from its mean

* (x-xbar)/s

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Q

STATS 3-3 3-4

to find the difference between x and mean

A

absolute value of x-xbar

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Q

STATS 3-3 3-4

How many standard deviations is that?

A

absolute value of (x- xbar) / Sx

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Q

STATS 3-3 3-4

to find lower z score boundary

A

z = xbar + (Sx *-2)

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Q

STATS 3-3 3-4

to find upper z score boundary

A

z = xbar + (sx *2)

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Q

STATS 3-3 3-4

comparing z scores

A

x = xbar + (Sx*Z)

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