Question: Another two-sample t confidence interval. Refer to the previous exercise. Suppose instead your study results were x1 5 110, x2 5 120, s1 5 8,

Another two-sample t confidence interval. Refer to the previous exercise. Suppose instead your study results were x1 5 110, x2 5 120, s1 5 8, s2 5 12, n1 5 10, and n2 5 10. Find a 95% confidence interval for the average difference using the second approximation for degrees of freedom.

Compare this interval with the one in the previous exercise.

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