Sound levels are measured at random moments under typical driving conditions for various full-size truck models. the excel anova results are shown below. the test statistic to compare the five means simultaneously is: 15.8. 2.96. 4.45. 5.56.

4.45

Step-by-step explanation:

Test Statistics (which is a random variable that is been computed and calculated from a set of data sample and used in a hypothesis test. A test statistics can be used to determine whether to reject the null hypothesis.) would follow a F distribution

Test Statistics = Mean Square Between / Mean Square Within = 154.1 / 34.6 = 4.45