Question: 1.A t-Based Confidence Interval for the Difference between Two Population Means: Equal Variances. 2. A t Test about the Difference between Two Population Means: Equal

1.A t-Based Confidence Interval for the Difference between Two Population Means: Equal Variances.

2. A t Test about the Difference between Two Population Means: Equal Variances.

3. t-Based Confidence Intervals for 12, and t Tests about 12: Unequal Variances.

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