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 na - 50 02 - 25 x, = 13.6 *, = 11.6 O , = 2.5 02 = 3 (a) What is the point estimate of the difference between the two population means? (Use x, - X2-) 2.0 (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