Karteikarten
Formulas
Karten in diesem Stapel (10)
- 1calculating probabilitiesz=(x - μ)/σ
z score= (x -mean) / stand. dev - 2calculating range (on non-standardized scale)x= μ + z σ
x = mean + (z-score)(stand. dev.) - 3normal distribution
- 4standard error (SE)SE=σ/√n
SE = st. dev of stat pop/sq rt of sample size
****SE expressed as "Standard Deviation of the Sampling Distribution" or "Standard Deviation of Sample Means" - 5t-distributiont = (x - m)/SE
=(raw value - sample mean)/SE - 6confidence intervalsCI= m - tcrit x SE
= m + tcrit x SE - 7tcritdf = n-1 for normal distr
### one tailed
qt(0.95, DF)
### two tailed
qt(0.975,DF) - 8single sample t-testt.test(data, mu=??)
- 9paired sample t-testt.test(data1, data2, mu=o, paired=TRUE)
- 10independent 2 samplet.test(vector1~vector2, data=MyData)
Informationen
- Beschreibung
- University STAM 200 Karteikarten am Formulas, erstellt von Sabreena Haque am 13/07/2022.
- Erstellt von
- Sabreena Haque
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