- A clinical trial is run to investigate the effectiveness of an experimental drug in reducing preterm delivery to a drug considered standard care and to placebo. Pregnant women are enrolled and randomly assigned to receive either the experimental drug, the standard drug or placebo. Women are followed through delivery and classified as delivering preterm (< 37 weeks) or not. The data are shown below.
What are the null and alternative hypotheses?
1. Ho: µ1 = µ2 = µ3
H1: means are not all equal
2. Ho: µ1 = µ2 = µ3
H1: µ1 > µ2 > µ3
3. H0: Treatment and preterm delivery are independent
H1: Treatment and preterm delivery are not independent
4. Ho: Z<1.96
A clinical trial is run to investigate the effectiveness of an experimental drug in reducing preterm
delivery to a drug considered standard care and to placebo. Pregnant women are enrolled and...
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