(Solved): Use minitab Another benchmark that was measured in the QSRMagazine.com drive-thru study was the serv ...

Another benchmark that was measured in the QSRMagazine.com drive-thru study was the service time. A summary of the results (in seconds) for two of the chains is shown below 1. Is there a difference in the average service time between these two chains? Test the null hypothesis that the chains' average service time is the same. Use a significance level of \( 0.05 \). 2. Construct a \( 95 \% \) confidence interval for the difference in average service time. 3. Lex plans to go to Taco Bell and Sam to McDonald's. Is the interval in part (b) likely to contain the difference in their service times they encounter? Explain your answer