Use the t-distribution to find a confidence interval for a difference in means 1-2 given the relevant sample results. Give the best estimate for 1-2, the margin of error, and the confidence interval. Assume the results come from random samples from populations that are approximately normally distributed. A 90% confidence interval for 1-2 using the sample results x1=9.9, s1=1.9, n1=50 and x2=13.3, s2=6.2, 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 .

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