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Unformatted text preview: 2271,2,3,4 Malone, Fall, 2010 Review sheet for Chaps 7, 8, 9, and 10 __________________________________________________ Inferential vs descriptive statistics Populations vs samples Parameters vs statistics Greek vs Roman alphabets Properties of the normal curve ubiquitous, simple, wellunderstood Data distributions vs sampling distributions Standard errors Why and when N matters Law of Large Numbers Central Limit Theorem what it says, when it applies, why it matters Standard (z) scores, standardization, unit normal distribution Reading a z table for percentiles Comparing scores to sample distributions, and means (or other statistics) to sampling distributions Null hypothesis significance testing  Six steps  Null hypothesis vs alternative / experimental hypothesis  One vs twotails  Alpha / significance level  Critical values  Reject vs fail to reject null hypothesis Sample standard deviation vs estimate of population standard deviation vs known population standard deviation ttest vs ztest Degrees of freedom (df) Three kinds of ttest  One sample  Two dependent / paired / matched samples  Two independent samples Comparing a statistic to a standard error Understanding the calculation of standard errors for different tests Knowing when to use each test ___________________________________ Problem of multiple tests F test Analysis of Variance (ANOVA) Variability (sum of squares) vs Variance (mean squares) Sources of variability/variance  Between groups (signal)  Within groups (noise)  Total (Between + Within) ANOVA Source Table  Betweengroup Sums of Squares, (numerator) degrees of freedom, and Mean Square Withingroup (error, residual) Sums of Squares, (denominator) degrees of freedom, and Mean Square  Total Sums of Squares and degrees of freedom  F statistic A priori (planned) comparisons (limited by numerator df) Post hoc comparisons  Tukey's Honestly Significant Difference (q statistic)  Bonferroni correction  ...
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This note was uploaded on 02/21/2012 for the course PYSC 227 taught by Professor Fairchild during the Fall '10 term at South Carolina.
 Fall '10
 Fairchild

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