Suppose That in the Previous Question the 95% Confidence Interval

question 18

Multiple Choice

Suppose that in the previous question the 95% confidence interval on the difference between group means was computed to be 2.63 ≤  µ1 -  µ2  ≤ 13.37. What can we conclude about the null hypothesis of no treatment effect?

• A) The difference is significant.
• B) The difference is not significant.
• C) The treatment doesn't work.
• D) Confidence intervals are totally unsuited to this question.

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