Consulting firm is responsible for creating a simulation package. I will operate a virtual plant along the production team to analyze process changing without affecting the actual line. One key component of the software is a set of estimates of downtimes for things such as service line supervisor has provided them with some educated gas of these values but they need to verify them for the software goes operational for a particular machine. The supervisor has suggested that the standard deviation of downtime for service is $4\mathrm{.}8$ minutes. They will use this number unless they can prove it is different than the value using a equals $0\mathrm{.}01.$ Fofor $31$ random services the downtime is your measured and the standard deviation was $6\mathrm{.}45$ minutes. what is the value of the test score