A bolt manufacturer is very concerned about the consistency with which his machines produce bolts. The bolts should be $0\mathrm{.}16$ centimeters in diameter. The variance of the bolts should be $0\mathrm{.}02.$ A random sample of $13$ bolts has an average diameter of $0\mathrm{.}17cm$ with a standard deviation of $0\mathrm{.}2629.$ Can the manufacturer conclude that the bolts vary by more than the required variance at $=0\mathrm{.}05$ level?

Step $2$ of $5$: Determine the critical value$($s$)$ of the test statistic. If the test is two$-$tailed, separate the values with a comma. Round your answer to three decimal places.