Consider the following results for two independent random samples taken from two populations. Sample 1 Sample 2 n 140 2 30 x1 13.5 X2 11.1 01-2.3 a. What is the point estimate of the difference...

Extracted text: Consider the following results for two independent random samples taken from two populations. Sample 1 Sample 2 n 140 2 30 x1 13.5 X2 11.1 01-2.3 a. What is the point estimate of the difference between the two population means? (to 1 decimal) σ 2-3.5 2.4 b. Provide a 90% confidence interval for the difference between the two population means (to 2 decimals). Use z-table. C. Provide a 95% confidence interval for the difference between the two population means (to 2 decimal s). Use z-table. If your answer is negative, enter mi