Use the t-distribution to find a confidence interval for a difference in means 121-2 given the relevant sample results. Give the best estimate for 121-2, the margin of error, and the confidence interval. Assume the results come from random samples from populations that are approximately normally distributed. A 99% confidence interval for 121-2 using the sample results x1=82.9, s1=12.5, n1=30, and x2=61.2, s2=7.7, n2=20 Enter the exact answer for the best estimate and round your answers for the margin of error and the confidence interval to two decimal places. Best estimate = Margin of error = Confidence interval :

Use the t-distribution to find a confidence interval for a difference in means 121-2 given the relevant sample results. Give the best estimate for 121-2, the margin of error, and the confidence interval. Assume the results come from random samples from populations that are approximately normally distributed. A 99% confidence interval for 121-2 using the sample results x1=9.5, s1=2.3, n1=50, and x2=13.2, s2=5.4, n2=50 Enter the exact answer for the best estimate and round your answers for the margin of error and the confidence interval to two decimal places. Best estimate = Margin of error = Confidence interval :