The mean service time of a physician

is $20$ minutes with a standard deviation

of $1\mathrm{.}7$ minutes. Upper specification limit

is $25$ minutes, whereas lower specification limit

is $15$ minutes for this process. Calculate the proper capability metric. Is the process capable?

Group of answer choices

Cp $=0\mathrm{.}98,$ not capable

Cpk $=0\mathrm{.}98,$ barely capable

Cp $=1,$ capable

Cpk $=0\mathrm{.}98,$ not capable

Cp $=0\mathrm{.}98,$ barely capable