TABLE 13-10 the Management of a Chain Electronic Store Would Like to Like

Short Answer

TABLE 13-10
The management of a chain electronic store would like to develop a model for predicting the weekly sales (in thousands of dollars) for individual stores based on the number of customers who made purchases. A random sample of 12 stores yields the following results:

-Referring to Table 13-10, what are the degrees of freedom of the t test statistic when testing whether the number of customers who make purchases affects weekly sales?