SCENARIO 13-3
the Director of Cooperative Education at a State $$\begin{array} { c c l } \text { Student } & \text { CoopJobs } & \text { JobOffer } \\1 & 1 & 4 \\2 & 2 & 6 \\3 & 1 & 3 \\4 & 0 & 1\end{array}$$

SCENARIO 13-3
The director of cooperative education at a state college wants to examine the effect of cooperative
education job experience on marketability in the work place. She takes a random sample of 4
students. For these 4, she finds out how many times each had a cooperative education job and how
many job offers they received upon graduation. These data are presented in the table below. $$\begin{array} { c c l } \text { Student } & \text { CoopJobs } & \text { JobOffer } \\1 & 1 & 4 \\2 & 2 & 6 \\3 & 1 & 3 \\4 & 0 & 1\end{array}$$
-Referring to Scenario 13-3, the director of cooperative education wanted to test the hypothesis
that the population slope was equal to 0. The denominator of the test statistic is sb1 . The value of
sb1 in this sample is ________.