University:
Eastern Kentucky University
Course:
STA 215 | Introduction to Statistical Reasoning
Academic year:

2020
Views:

444

Pages:

1
Author:

Lance Gutierrez

Math symbols x a data value or a value from a population Σ Uppercase sigma, “sum up” n Sample size ∑x Sum of the values X Sample mean µ Mu, Population mean S Sample standard deviation σ Lower case Sigma, Population standard deviation Sample Variance σ S 2 2 Population Variance p Sample proportion p Population proportion f frequency Q1 First quartile Q2 Second Quartile Q3 Third Quartile µX The mean of the population of all possible sample means The standard deviation of the population of all possible sample means The variance of the population of all possible sample means The mean of the population of all possible sample variances µp The mean of the population of all possible sample proportions The standard deviation of the population of all possible sample proportions The variance of the population of all possible sample proportions σX σ 2X µS 2 Z Standard normal distribution or a “Z-score” tn The student’s t distribution with n degrees of freedom σP σ 2P Z α 2 Confidence interval limits based on Z-scores tα χ 2 2 L Confidence interval limits based on t-scores Left confidence interval limit based on a Chisquared distribution Right confidence interval limit based on a Chisquared distribution χ 2 n Chi-squared distribution with n degrees of freedom χ 2R α Significance level, usually .05 or .01 H1 k The number of categories for a qualitative or categorical variable H 0 Null hypothesis Alternative hypothesis