120 College protests of labor exploitation. The Journal of World-Systems Research (Winter 2004) did a study of student “sit-ins” for a “sweat-free campus” at universities.

The SITIN file contains data on the duration (in days) of each sit-in, as well as the number of student arrests. The data for 5 sit-ins in which there was at least one arrest are shown in the table. Let y = number of arrests and x = duration.

a. Give the equation of a straight-line model relating y to x .

b. SPSS was used to fit the model to the data for the 5 sitins . Give the least squares prediction equation.

c. Interpret the estimates of b0 and b1 in the context of the problem.

d. Find and interpret the value of s on the printout.

e. Find and interpret the value of r 2 on the printout.

f. Conduct a test to determine whether number of arrests is positively linearly related to duration. (Use a = .10 .)

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Sit-In University 12 Wisconsin 14 SUNY Albany 15 Oregon 17 Iowa 18 Kentucky Duration (days) 4134L 1 Number of Arrests 54 11 14 16 12 Based on Ross, R. J.S. "From antisweatshop to global justice to antiwar: How the new new left is the same and different from the old new left." Journal of Word-Systems Research, Vol. X, No. 1, Winter 2004 (Tables 1 and 3).