Analyzing quantitative data

1
Analyzing quantitative data section III

• Week 10 Lecture 1

2
Test whether two groups are different

• Categorical data (nominal and rank scale)
• Kolmogorov-Smirnov test
• Quantifiable (interval and ratio scale)
• T-test
• Independent groups t-test
• Paired t-test
• To test whether three or more groups are
  different
• One way ANOVA

3
Assess the strength of relationship

• Assess the strength of relationship between pairs
  of variables
• Correlation coefficient

4
Linear regression analysis

• Assess the strength of a cause-and-effect
  relationship between variables
• Regression equation
• DV b0 b1IV1 b2IV2
• Predict the value of a variable from one or more
  other variables