(solution) Summary statistics are given for independent simple random

(solution) Summary statistics are given for independent simple random

Summary statistics are given for independent simple random samples from two populations. Use the pooled t-interval procedure to obtain the specified confidence interval.

1 = 71.8, s1 = 3.1, n1 = 11, 2 = 67.0, s2 = 3.2, n2 = 9
Determine a 99% confidence interval.

0.08 to 9.52 
0.73 to 8.87 
1.19 to 8.41 
1.97 to 7.63