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Compute the 95 confidence interval for the difference in


Consider the following information:

Treatment group: n = 101, mean = 65.107, Std dev = 2.847, and Std error = 0.403

Placebo group: n = 101, mean = 66.183, Std dev = 3.205, and Std error = 0.453.

  • Compute the 95% confidence interval for the difference in group means.
  • Interpret the confidence interval.
  • Can we conclude there is a difference in the group means? Explain.

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Basic Statistics: Compute the 95 confidence interval for the difference in
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