SFS - Student Formula Sheet Parameter/Statistic Population...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Student Formula Sheet Parameter/Statistic Population Sample mean Population x N = Sample x x n = variance ( 29 2 2 2 2 2 ( ) 1 1 ( 1) x x s n x x s n n n- =- =--- standard deviation 2 = 2 s s = coefficient of variation (CV) 100 CV = 100 s CV x = interquartile range (IQR) Q 3 Q 1 outliers 1 3 1.5 1.5 x Q IQR x Q IQR <- + z-score for single data point x z - = x x z s- = z-score for sample mean / x z n - = Formulas for Correlation and Regression Statistic Formula Use r 1 1 n i i i x y x x y y s s n =--- indicates strength of correlation on [-1,1], r 2 is the fraction of variation in y, explained by the variation in x b y x s r s slope of regression line a y bx- y intercept of regression line e Given y y y a bx- = + residuals used to see if any remaining structure exists Interpreting |r| 0 0.2 negligible 0.2 0.4 low 0.4 0.6 moderate 0.6 0.8 high 0.8 1 very high Formulas for Distributions Probability Rules 2 2 2 2 2 ( ) x N x N - = =- { }...
View Full Document

Page1 / 5

SFS - Student Formula Sheet Parameter/Statistic Population...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online