A researcher claims that the average wait time for help on t…

A researcher claims that the average wait time for help on the IRS’ support site is more than 75 minutes.  At the 0.05 significance level, what’s the critical value?  If the test statistic is 2.15, what would you conclude about the null hypothesis?   Include your work and final answers on the results that you upload.  Do not enter your answer below.