This bestselling textbook is designed to help students understand parametric and nonparametric statistical methods so that they can tackle research problems successfully. By working through this book carefully and systematically, those who may not have a strong background in mathematics will gain a thorough grasp of the most widely used statistical methods in the social sciences.
One group: repeated observations on the same subjects under two conditions
|Group 1||Condition 1||Condition 2|
Before and after treatment
|Group 1||Before Treatment Observations (b)||After Treatment Observations (a)|
14.1 Using the t TEST FOR CORRELATED DATA
A researcher investigating the effectiveness of different forms of advertising randomly selects ten subjects to take part in an experiment to determine if reaction time to a visible stimulus is different from reaction ...