Answer
$t_0=0.83$ with a P-value $\gtα$. Do not reject the null hypothesis.
There is not enough evidence to conclude that the wait times are different.
Work Step by Step
$H_0:µ_{Before}=µ_{After}$ versus $H_1:µ_{Before}\neµ_{After}$
In MINITAB, enter the Wait time before new procedure values in C1 and the Wait time after new procedure values in C2.
Select Stat -> Basic Statistics -> Paired t
Select Each sample in a column.
In Sample 1 enter C1 and in sample 2 enter C2.
Click Options. In Confidence level enter 95.0, in Hypothesized difference enter 0 and in Alternative hypothesis enter Difference $\ne$ Hypothesized difference. Click OK.
Click OK.
$t_0=0.83$ with a P-value $=0.483\gtα=0.05$
