6.1

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 (a) What is the point estimate of the difference between the two population means? (Use )_(1 ;2.) :1 (b) What is the degrees of freedom for the 1\" distribution? (Round your answer down to the nearest integer.) :1 (c) At 95% confidence, what is the margin of error? (Round your answer to one decimal place.) :l (d) What is the 95% confidence interval for the difference between the two population means? (Use :(1 ;2. Round your answers to one decimal place.) :lt:l