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Unformatted text preview: 227-1,2,3,4 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, well-understood 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 two-tails - 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 t-test vs z-test Degrees of freedom (df) Three kinds of t-test - 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 - Between-group Sums of Squares, (numerator) degrees of freedom, and Mean Square Within-group (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