Which statement best describes the results of Exercise 32 ?

i. For each of the four soils, we are \(95 \%\) confident that the mean speed is greater when the torque is lower.
ii. For each of the four soils, we are \(95 \%\) confident that the mean speed is greater when the torque is greater.

Data From Exercise 32:

For each of the following types of soil, find the median value of the torque for all observations in that soil. Then let \(\mu_{L}\) be the mean speed when the torque is below the median, let \(\mu_{U}\) be the mean speed when the torque is above the median, and find a \(95 \%\) confidence interval for \(\mu_{U}-\mu_{L}\).
a. GSG soil
b. CCS soil
c. GSF soil
d. GSGu soil