The following results come from two independent random samples taken of two populations. Sample 1 Sample 2 n1 50 n2 35 x1 13.2 x2 11.2 01 2.2 02 3.3 a. What is the point estimate of the difference between the two population means? (to 1 decimal) b. Provide a 90% confidence interval for the difference between the two population means (to 2 decimals). l.) c. Provide a 95 % confidence interval for the difference between the two population means (to 2 decimals). l.)