The confidence interval for the true differences of the means assuming equal variance will be 1369.6, 69.7.
It should be noted that a confidence interval simply means the mean of the estimate plus and minus the variation that is in the estimate.
Based on the information, it should be noted that the critical value is given as 2.131. Therefore, the 95% confidence interval will be:.
= (1073 - 1723) -/- 2.131 × ✓(664)²/12 + ✓(816²/9)
= -650 +/- 719.715
= -1369.6, 69.7
Therefore, the confidence interval for the true differences of the means assuming equal variance will be 1369.6, 69.7.
Complete question:
The remainder of the question is to construct a 95 percent confidence interval for the true differences if the means assuming equal variance.
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