chapter 14

Question 1

Advantages of Two-Sample Designs

Answer 1

• Population parameters are often unavailable
• Two samples are easier to obtain
• Well designed experimental comparisons can be
  constructed to help minimize the number of plausible alternative explanations for results

Question 2

Assumptions for Correlated Samples t Test

Answer 2

• Sampling distribution of 𝐷 be normally distributed
• (N ≥ 30 or just assume for this class)
• Participants are the same in each condition or are
  matched on a specific variable
• IV is nominal and has two levels and DV is interval or
  ratio (Likert scales are interval)