Page 16 - Statistics for Dummies

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Statistics For Dummies, 2nd Edition
Working with Linear Regression ................................................................286
Figuring out which variable is X and which is Y ............................287
Checking the conditions ...................................................................287
Calculating the regression line .........................................................288
Interpreting the regression line .......................................................290
Putting it all together with an example:
The regression line for the crickets .............................................291
Making Proper Predictions .........................................................................292
Explaining the Relationship: Correlation versus Cause and Effect .......293
Chapter 19: Two-Way Tables and Independence . . . . . . . . . . . . . . . .295
Organizing a Two-Way Table .....................................................................296
Setting up the cells ............................................................................297
Figuring the totals ..............................................................................297
Interpreting Two-Way Tables .....................................................................298
Singling out variables with marginal distributions........................299
Examining all groups — a joint distribution...................................302
Comparing groups with conditional distributions ........................305
Checking Independence and Describing Dependence ............................308
Checking for independence ..............................................................308
Describing a dependent relationship ..............................................311
Cautiously Interpreting Results .................................................................312
Checking for legitimate cause and effect ........................................313
Projecting from sample to population ............................................314
Making prudent predictions .............................................................315
Resisting the urge to jump to conclusions .....................................315
Part VI: The Part of Tens ........................................... 317
Chapter 20: Ten Tips for the Statistically Savvy Sleuth . . . . . . . . . . .319

Chapter 21: Ten Surefire Exam Score Boosters . . . . . . . . . . . . . . . . . .331
Appendix: Tables for Reference .................................. 347
Index ....................................................................... 357

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