Independent random samples were selected from two quantitative populations, with sample sizes, means, and variances given below. Population 1 2 Sample Size 39 43 Sample Mean 9.3 7.3 Sample Variance 8.74 14.42 Construct a 90% confidence interval for the difference in the population means. (Use ?1 − ?2. Round your answers to two decimal places.) to Construct a 99% confidence interval for the difference in the population means. (Round your answers to two decimal places.) to

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