Let X denote the distance of depted that gopher can drill per hour. These data are obtained upon 10 test holes.
2.0 1.7 2.6 1.5 1.4 2.1 3.0 2.5 1.8 1.4
A. Employ this data to find x', s^2, s.
B. Determine a 90% confidence interval upon the average distance that can be drilled in an hour.