Using an Independent-Measures T,the 90% Confidence Interval for the Difference

question 61

Multiple Choice

Using an independent-measures t,the 90% confidence interval for the difference between two population means ranges from 19 to 23.Based on this confidence interval,how big is the difference between the two sample means?

• A)4 points
• B)19 points
• C)21 points
• D)23 points

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