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Flashcards do conjunto (21)
- 1Μew (both literally, and in equation form)Population Mean
- 2σstdev,
n-1 if stdev of a sample
- 3When is 3 column method used and what is it?It's used whenever you have to find the standard deviation
xi, xi-M, (xi-M)^2
(or x̄) - 4xi"Look at every observation!"
- 5x̄Sample mean
- 6—Random variable minus sample mean
- 7Ubmean + 3(stdev)
detects upper outliers - 8Lbmean - 3(stdev)
detects lower outliers - 9—(Random variable minus sample mean)^2
- 10zi = and what it literally meansHow many stdevs away (+ or -) from the mean a random number is
- 11z score units, decimal places, z's mean, stdev, upper/lower outlierno units, 2 decimal places, mean = 0, stdev = 1, +-3,
- 12How to standardizeGet the z score
- 13P(z>x)Probability that z is greater than x
- 14z(subscript .05)The area under the curve is .05
- 15Empirical Rule68% fall between first stdevs, 95% fall between first two, 99.7% fall between first three, .03% are outliers
- 16S
- 17Mean of X̄Mean of the sample mean=population mean=M
- 18Stdev of X̄
- 19Standardization of X̄
- 20CLTcentral limit theorem
X̄ can be standardized as Z if either pop is normal or if n>30 - 21—
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- FlashCards sobre Sem título, criado por Zachary Hage em 07-11-2022.
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- Zachary Hage
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