Sub Sandwich Customers
the Marketing Manager of a Sub Shop

Sub Sandwich Customers
The marketing manager of a Sub Shop chain is in the process of examining some of the demographic characteristics of her customers.In particular,she would like to investigate the belief that the ages of the customers of Sub Shops,hamburger emporiums,and fast-food chicken restaurants are different.The ages of eight randomly selected customers of each of the restaurants are recorded and listed below.From previous analyses we know that the ages are normally distributed with equal variances for each group.
$$\begin{array}{l}\text { Customers' Agas }\\\begin{array} { | c c c | } \hline \text { Subs } & \text { Hamburaer } & \text { Chicken } \\\hline 23 & 26 & 25 \\19 & 20 & 28 \\25 & 18 & 36 \\17 & 35 & 23 \\36 & 33 & 39 \\25 & 25 & 27 \\28 & 19 & 38 \\31 & 17 & 31 \\\hline\end{array}\end{array}$$
-{Sub Sandwich Customers Narrative} Set up the ANOVA Table.Use $\alpha$ = 0.05 to determine the critical value.