You may need to use the appropriate appendix table or technology to answer this question. The following results come from two independent random samples taken of two populations. Sample 1 Sample 2 1 = 50 n, = 25 x, = 13.6 *, = 11.6 51 = 2.1 - = 3 (a) What is the point estimate of the difference between the two population means? (Use x] - x2.) (b) Provide a 90% confidence interval for the difference between the two population means. (Use x, - x,. Round your answers to two decimal places.) to (c) Provide a 95% confidence interval for the difference between the two population means. (Use x, - x,. Round your answers to two decimal places.) to