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ment: 10.2 Practice Assignment Score: 0.0 Save Submit Assignment for Grading ns Exercise 10.09 (Self-Test) Algorithmic Question 1 of 3 O Check My Work eBook Video Consider the following results for independent random samples taken from two populations. Sample 1 Sample 2 n 1 = 20 n 2 = 40 x 1 = 22.7 x 2 = 20.9 S 1 = 2.7 S 2 = 4.1 a. What is the point estimate of the difference between the two population means (to 1 decimal)? b. What is the degrees of freedom for the t distribution (round down your answer to nearest whole number)? c. At 95% confidence, what is the margin of error (to 1 decimal)? d. What is the 95% confidence interval for the difference between the two population means (to 1 decimal)? If your answer is negative value, entre minus (-) sign. Use z-table. Check My Work O Icon Key