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Construct an 80% confidence interval for the difference between two population means using the sample data below that have been selected from normally distributed populations

Construct an 80% confidence interval for the difference between two population means using the sample data below that have been selected from normally distributed populations with different population variances.

sample 1 370 ,382,406,461,386,449,376,430,341,351,429,416

sample 2 400, 370,356,338,329,280,362,296,317,313,437,432

The 80% confidence interval is

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