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A study is designed to investigate whether there is a

Question # 00622023
Subject: Statistics
Topic: General Statistics
Due on: 11/25/2017
Posted On: 11/25/2017 12:11 PM

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Chi-Square Test for Independence of Two Groups

A study is designed to investigate whether there is a difference in response to various treatments for patients with chronic pain. The data is shown below. Is there a statistically significant difference in the proportions of patients who show improvement? Between treatment 1 and 2? Use a 5% level of significance.

Critical value =

_________// Symptoms worsened // No effect // Symptoms improved // Total

Treatment // 1 // 22 // 14 // 14 // 50

Treatment // 2 // 14 // 15 // 21 // 50

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