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Interval for the difference of the population

John wants to compare two means. His sample statistics were Picture and Picture. Assuming equal variances, the 95 percent confidence interval for the difference of the population means is approximately: [2.44, 6.19]. [1.17, 5.08]. [0.08, 4.32]. [-0.09, 3.19].

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## Q : Determine expected value

Chi-squared: A study is designed to investigate whether there is a difference in response to various treatments in patients with rheumatoid arthritis. The outcome is patient's self-reported effect of treatment into 1 of 3 categories. The data are