ANATOMY OF THE STATISTICAL ALPHABET Selected Symbols for

ANATOMY OF THE STATISTICAL ALPHABET: Selected Symbols for Intro Statistics • a: Alpha – level of significance, • M: Median probability of a Type I error. • MR: Midrange • b 0: Y-Intercept • N: Population Size • b 1: Slope of a Line • n: Sample Size • b: Beta – probability of a Type II error • cf: Cumulative Frequency • r: Rho – Population Correlation • rf: Relative Frequency • s: sample standard deviation • s: population standard deviation • : Standard Deviation of the sample means • p: Population Proportion • S: Summation Notation • P: Probability, Percentile • t: t-test value • n. Cr: Combination of n objects taken r at a • • m: Mu – population mean • C. V. : Critical Value • P(B|A): Conditional Probability • • CVar: Coefficient of Variation • P(E): Probability of an Event • X: Variable (Capital letters) • D: Decile • • X 2: Chi-square • d. f. : Degrees of freedom • n. Pr: Permutation of n objects taken r at a time • : Sample mean (x-bar) • e: Euler’s constant, 2. 7183 • p: Pi • x: Independent variable (regression) • E: Event; • Q: Quartile • y: Dependent variable (regression) • E(X): Expected Value • q: (1 – p), Proportion • • f: Frequency • Q: Quartile • H 0: Null Hypothesis • q: (1 – p), Proportion • H 1: Alternative Hypothesis (also Ha) • r: Sample Correlation • IQR: Inter Quartile Range • r 2: Coefficient of Determination • k: number of samples • R: Range • crf: Cumulative Relative Frequency time Margin of Error : (p-hat) – Sample Proportion : Probability of the Compliment of E : Mean of the sample means : Estimate of the dependent variable value (regression) • z: Standardized variable; z-score • : Z Alpha/2 – an area in the tails of the standard normal curve