Which of the following research situations is most likely to use an independent-samples design?

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
1st Edition
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:HOUGHTON MIFFLIN HARCOURT
Chapter11: Data Analysis And Displays
Section11.3: Shapes Of Distributions
Problem 20E
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Which of the following research situations is most likely to use an independent-samples design?

  1. Evaluate the effectiveness of a diet program by measuring how much weight is lost during 4 weeks of dieting
  2.   evaluate the  development of verbal skills from each 22 H3 for a sample of girls measured over time
  3.  evaluate the difference in verbal skills between 3 year old girls and 3 year old boys
  4.  evaluate the effectiveness of cholesterol medication by comparing cholesterol levels before and after the medication
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