Texts: n1 = 7, n2 = 9, x1Ì„ = 127, x2Ì„ = 157, s1 = 33, s2 = 27
Use this data to find the 95% confidence interval for the true difference between the population means. Assume that the population variances are equal and that the two populations are normally distributed.
Step 1 of 3:
Find the point estimate that should be used in constructing the confidence interval.
Step 2 of 3:
Find the margin of error to be used in constructing the confidence interval. Round your answer to six decimal places.
Step 3 of 3:
Construct the 95% confidence interval. Round your answers to the nearest whole number.