A business recently added a policy that allows their customer service operators to take a paid 30-minute "power nap" during the middle of the day if they feel fatigued. The hope is to reduce customer complaints. 10 randomly selected operators were selected and the number of complaints they received in the six months prior to the new policy and in the six months after the new policy were recorded. The data were analyzed using a matched pairs analysis with the results shown here:

Paired T Test for Before - After Null Hypothesis: difference = 0 Alternative Hyp: difference > 0 Mean 3.9000 Std Error 1.3618 Mean - H0 3.9000 Lower 95% CI 0.8194 Upper 95% CI 6.9806 T 1.86 DF 9 P 0.0479 Cases Included 10 Missing Cases 0 

Interpret the confidence interval given in the printout.

Group of answer choices

At the 95% confidence level, we can not determine a difference between the mean number of complaints for all operators after the policy was implemented and the mean number of complaints before the new policy.

We are 95% confident that the mean number of complaints for all operators after the policy was implemented is lower than the mean number of complaints before the new policy.

We are 95% confident that the mean number of complaints for all operators after the policy was implemented is higher than the mean number of complaints before the new policy.

We are 95% confident that the mean number of complaints for all operators after the policy was implemented is equal to the mean number of complaints before the new policy.