You may need to use the appropriate appendix table or technology to answer this question. The following results are for independent random samples taken from two populations. Sample 1 Sample 2 n = 20...

Extracted text: You may need to use the appropriate appendix table or technology to answer this question. The following results are for independent random samples taken from two populations. Sample 1 Sample 2 n = 20 n2 = 30 X,22.5 X = 20.1 S1 = 2.9 S2 = 4.2 (a) What is the point estimate of the difference between the two population means? (Use x, - x.) 2.4 (b) What is the degrees of freedom for the t distribution? (Round your answer down to the nearest integer.) 46 (c) At 95% confidence, what is the margin of error? (Round your answer to one decimal place.) 22 Enter a number. (d) What is the 95% confidence interval for the difference between the two population means? (Use x, - Xg. Round your answers to on | to (46